Product description

Pro Audio Bluetooth Pre-amplifier Receiver System - Digital Rack Mount Studio Preamp, Recording Mode, FM Radio



Features:

• Rack Mount pre-amplifier Sound Receiver System

• Bluetooth Wireless Audio Streaming Ability

• Unique Recording Mode Saves Audio via USB/SD Port

• USB Flash & SD Memory Card Readers

• Aux (3.5mm) Input Jack

• Connect & Stream Audio from External Devices

• FM Radio with Digital LCD Display

• ID3 Tag Readout Displays Song Title

• Multi-Source RCA (L/R) Audio Input Connectors

• RCA (L/R) Audio Output Connectors

• Combo 1/4’’ / XLR Combo/Microphone Input Jack

• XLR Audio Output Jacks

• Front Panel Button Control Center

• Independent Input Source Selectable

• Bass, Treble, Mid, Balance, Master Volume Adjustable

• Headphone Jack, 3.5mm



Bluetooth Connectivity:

• Built-in Wireless Music Streaming Receiver

• Compatible with All of Your Favorite Bluetooth Devices

• (iPhone, Androids, Smartphones, iPad, Tablets, etc.)

• Bluetooth Version: 2.1

• Bluetooth Network Name: BT

• Wireless Range: 25’+ ft.



What's in the Box:

• Remote Control

• FM Antenna

• Detachable Hardware Rack Mounts

• Power Cable



Technical Specs:

• Rated Power input: 7W

• Input currency: 30mA

• Max power consumption: 15W

• Construction Material: Metal, Aluminum Alloy Panel

• Frequency response: 20-20KHz, +/-2dB

• S/N Ratio: >85dB

• T.H.D.: <1.0%

• Input sensitivity: 200mV (Max Output: 6000mV)

• Battery Operated Remote Control, Requires x ‘CR-2032’ Battery (Included)

• Maximum USB Flash & SD Memory Card Support Size: 32GB

• Digital Media File Support: MP3, WAV

• Power Cable Length: 4.5’ ft.

• Power: 120/240V, Switchable

• Dimensions (L x W x H): 19.0’’ x 4.7’’ x 1.7’’ -inches

• Sold as: 1

• Weight: 4.61 lbs.

• RACK MOUNT COMPATIBLE: Pyle pro audio pre-amplifier has FM radio tuning and unique recording mode that saves audio via USB/SD port. Also, pack with detachable hardware rack mounts for quick and easy assembly
• 2. 1 BLUETOOTH VERSION: Built-in Bluetooth for wireless music streaming receiver that ranges up to 25’+ ft with digital LCD display. It works with all of today’s latest devices such as iPhone, android, smartphone, iPad, tablets, computer and the likes
• AUX INPUT AND OUTPUT: This receiver/preamp also features two sets of RCA inputs, RCA preamp out, 2 Mono RCA's for subwoofer output, and Bluetooth that wirelessly connects to your iPod and MP3 player. Also, an FM antenna for better signal reception
• FRONT CONTROL CENTER: The front panel button control center consists of a power switch, independent input source selectable, bass, treble, mid, balance and master volume adjustment. Also, pack with headphone jack, USB flash and SD memory card readers
• REMOTE CONTROL: A simple and user-friendly remote control is included with the PPRE70BT, providing all the functionality you need from switching input sources. And, it will allow you to access all functions of the receiver quickly and efficiently

User questions & answers

Question:	How many watts is this amplifier
Answer:	This is not an amplifier, it is a pre-amplifier which means that you need a separate amplifier in order to drive speakers.
Question:	The description says two (02) mono rca outputs for subwoofers. where are they
Answer:	You're right that the description says that there are 2 mono outputs for subwoofers but I think that is an error. The picture that there is of the back of the unit is correct, as is the labeling that accompanies the picture.
Question:	can you use rca in and bluetooth out
Answer:	No. The Bluetooth feature is only for receiving from a Bluetooth device as a source.
Question:	Can someone confirm that the remote control can in fact control the master volume on the preamp unit
Answer:	Neither of the other two answers are correct! Here’s the deal. This device has an analog knob with aux 1, aux 2, aux 3, and another multi-function input that includes the radio, bluetooth, and the media card stuff. The volume only works on some of the inputs. Bluetooth, radio, and the media card are routed through the digital, remote controllable volume control. The switch between Aux 1, aux 2, aux 3, and the multi-function input is routed through the master analog volume control, which is controlled by an analog knob that is not remote controllable. I had hoped that this device would offer remote control of the analog RCA inputs, but it does not.

Product features

Pyle Pro Rack Mount Studio Pre-Amplifier

Pyle's Stereo is the perfect solution for all of your audio needs. Using the latest sound amplification technology, this is designed to deliver crisp stereo sounds from a wide range of connected music sources. This pro digital rack-mount preamplifier features FM radio and Bluetooth connectivity. Unique recording mode that saves audio via USB/SD Port.

About Pyle

Pyle has been in business for over 35 years, and their manufacturing experience and expertise is easy to see - and hear.

• 🍎 NOTE: This is a preamplifier, not a power amplifier or phono preamp, can't be used for turntables or passive speakers.
• RCA input to the computer, CD, phone, iPod and other player and RCA output to the digital amplifiers, active multimedia audio devices for lossless audio(The RCA cables not included).
• Small compact design, with optimal integrated circuit to get powerful, dynamic and sweet sound. Tubes can be replaced by 6K4,6AK5,EF95, 5654,403B tubes.
• This pre-amp improves everything detail, transparency, immediacy, richness, tone associated with your music.
• Built-in Switch impact protection circuit and overheat protection circuit, long life span of this unit. All aluminum alloy shell and come with a 18-month manufacturer's warranty.

User questions & answers

Question:	Can this preamp connect to my active speakers? or just connnect to power amplifier
Answer:	Hi, This is a stereo preamplifier, you can connect it to the active speakers or power amplifier than to passive speakers.
Question:	I have this hooked up to bookshelf speakers, sounds great, would i hear a noticable difference hooking it to a subwoofer
Answer:	I currently use the Pre-Amp with a powered subwoofer amp, it works just fine. The P1 has frequency response down to 20hz, so adding a subwoofer may be worth your while.
Question:	Can i hook this up to a 2 channel receiver? i have a pioneer sx-10ae
Answer:	Yes you can if your receiver has output/input jacks for the Fosi to be in a "loop". If you do not have input/output jacks then you would be relegated to installing the Fosi to cd player or turntable or whatever component you are trying to acquire a bit of tube sound. I use mine to "soften "a bright metal tweeter in my speakers. Since I have separate components it was easy to install in my case. Also check to see if your receiver has "preamp" in/out jacks. This would also allow you to install the Fosi to have a effect on your receiver as well as any other components you have connected to it. A bit of research on your part will be required.
Question:	Is there a recommended replacement tube
Answer:	I replaced the stock ones with the Riverstone Audio 7-Pin GE JAN 5654W (https://www.amazon.com/gp/product/B01BFJDTW0/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1). They are very nice tubes but do need about 20-25 hours of solid burn-in before they start to "warm up the sound" in my opinion.

Product features

6K4 Tube Preamplifier

• Power Adapter Output: 12V/1.5A
• Product Adapter Input Voltage Range: AC 110V - 240V
• SNR ≥ 98dB
• THD ≤ 0.1%
• Treble adjustment range: ±6dB
• Bass adjustment range: ±10dB
• Input Mode: RCA
• Frequency Response: 20HZ -20KHZ((±3dB)

Tube preamp with BASS and TREBLE control

Satisfies your need for more sound quality! Great Warm Smooth Sounding!

Simple, thoughtful design

Fosi Audio P1 is easy to connect to your power amplifier or active(powered) speakers with no software to install or settings to change.

Adopt 2pcs 6K4 vacuum tubes

Powerful, dynamic, and sweet TUBE SOUND! Applicable vacuum tube model:6J1,6AK5,EF95, 5654,403B, etc.

Product description

This electronic preamplifier stands up to the test and will provide you with serious sound performance. The PP444 is perfect for bringing your studio equipment's phono-level output to a more suitable line-level output. It'll take your audio signal, amplify its strength and prepare it for further processing by your receiver or amplifier. Preamps technically provide voltage gain to your desired equipment and are key to assisting the signal source, whether it's a turntable, musical instrument or microphone. The ultra-low noise audio conditioning circuitry allows the preamp to boost audio to levels that are more manageable for various types of audio equipment. You'll find it easier to adjust the recording level volumes of different sources from microphones and instruments alike. You should position your preamp close to the source to reduce unwanted noise and interference. Preamps can sometimes come built into the stereo equipment, but if that's not the case, the PP444 is an easy install, wise choice and great addition to any musician or producer. Take your sounds and audio production skills to the next level with the PP444 Preamplifier. Features: Converts Phono Signals to Line Level Signals State-of-the-Art Circuitry Accommodates Magnetic Pickups Ultra-Low Noise Operation Improves Sound Performance Connects to Turntables and Other Studio Equipment Input Sensitivity: 3mV at 50K Ohms (Phono) Dedicated RCA and 1/4" Output Connectors Output: 2V max (P-P) at 10K Ohms DC 12-Volt Power Adapter Included Frequency Response: 20 Hz ~ 20 KHz ±2dB S/N Ratio (A-WTD): 70 dB - Output Level: 2V THD: 0.08% @ 1KHz and 3mV Input | S/N Ratio: 70dB Input Sensitivity/Impedance/Phono 3 mV/50K Ohms Load Impedance: 10K Ohms - Reference Voltage: 1V d Dimensions (W x H x D): 3.54" x 2.13" x 1.02" Sold as: Unit Weight: 0.85 lbs.

From the Manufacturer

&

	PP444	PP555	PP999	PHE300	PHE400
	Turntable / Phono Pre-Amplifiers			Noise / Hum Eliminators
Jacks	RCA & 1/4''	RCA & 1/4''	RCA	1/4'' TRS	1/4'' TRS & XLR
12V DC Adaptor	✔	✔	✔

• CONVERTS PHONO SIGNALS: A turntable preamp that converts phono signals to Line Level Signals This state-of-the-art circuitry phono preamp can accommodate magnetic pickups with an input sensitivity of 3mV at 50K Ohms
• LOW NOISE OPERATION: Offers outstanding performance with it’s Low-Noise Audio Operational Amplifiers The output is 2V max (P-P) at 10K Ohms It’s better to position the preamp close to the source to reduce unwanted noise and interference
• CONNECTS TO TURNTABLES: Connect any turntable to modern sound equipment without specialized phono input for amplifying music For the receiver, this can be connected to speakers, computers, laptops and more
• SIMPLE PLUG & PLAY: This mini preamp has stereo RCA inputs and stereo RCA outputs Connect the turntable to the RCA inputs and ground Then, connect the amplifier receiver to the RCA outputs
• 1 YEAR WARRANTY: We guarantee this electric phono preamplifier with both a 30 day no hassle money back return policy and a 1 year manufacturer’s guarantee

User questions & answers

Question:	Does this thing have an/off switch or do you need to plug/unplug everytime you use it
Answer:	no switch. You can plug/unplug, I leave it plugged in all the time.
Question:	Unit works fine for awhile and then starts outputting static, even with no input connected. I've tried it with several amps with the same results
Answer:	Most likely people who are having noise problems it is because of ground loop isolation problem. If you have a ground loop isolation problem grounding the preamp box is unlikely to help. Without getting technical, what you want to buy is a ground loop isolator or a humm eliminator; both the ground loop isolator and humm eliminator tackles the cause of the noise at the fundamental source of the problem, depending on your audio setup, one maybe easier to use than the other. To use the ground loop isolator or the humm eliminator they generally come with instructions, or you can google this topic. If the noise in your audio system isn't fixed by using this solution the first time, try putting the ground loop isolator and humm eliminator at various points in your audio system. Also you can talk to audio people and get advice about how to fix ground loop problems from people who setup big audio systems, for concerts and such; if you talk to the average electronic garage shop audio enthusiast you are likely to get bad advice, i.e., meaningless explanations. Also caution must be used when Googling this topic, much of the discussion, advice and explanation on this topic is bogus, you can get a general correct feel of this topic if you read a number of explanations. Also one more thing that can cause a "popping noise" is that you have too much gain, this is a phono amp and the gain is huge, it takes a 3mV and makes it 2Vp-p this is a gain of around 100 to 200, if you gain up the audio signal too much then the signal out of your amplifier runs out of head room and clips, this can cause a popping sound, essentially you have too much gain. If this is occurring you need to either buy a preamp with less gain or attenuate the signal before it gets to the preamp. If this is a problem, too much gain, you can buy preamps with gain control.
Question:	My turntable has very quiet output. Will this device help boost the volume
Answer:	Yes, indeed. If your need was like mine (no built-in pre-amp on the turntable and no specifically dedicated phono input on your amplifier) you will find this unit to be the perfect solution to needed amplification of the turntable's output. Don't forget to hook up the ground wire as directed or you may wind up putting unwanted noise into the audio.
Question:	My amp DOES have a Phono Input, but my cartridges are low output. Can I use this to boost the signal using the Phono Input to reduce audible hiss
Answer:	No, you can't. This is a phono preamp with RIAA playback equalization that amplifies the signal about 100 times, so it essentially does what your built-in phono preamp does. The output signal from the separate preamp is equalized to a nominally "flat" frequency response and the amplified signal level will overload and probably damage your built-in phono preamp. Plug it into any other stereo line input on your system (AUX, CD, DVD, TAPE, VCR, etc.), but NOT the PHONO input! If you need higher signal gain, maybe look at phono preamps from ART or TCC that have output level controls. If you use moving-coil (MC) cartridges, you need a preamp specifically designed for them...they require at least 55 dB (over 500 times) signal gain vs. about 40 dB (100 times) for moving-magnet (MM) cartridges. Noise becomes a critical issue with MC cartridges because of their extremely low signal output, so good-quality cables and good turntable grounding are essential.

Product features

Pyle Phono Turntable Preamp Mini Electronic Audio Stereo Phonograph Preamplifier with RCA Input, RCA Output & Low Noise Operation Powered by 12 Volt DC Adapter

• Converts Phono Signals to Line Level Signals
• State-of-the-Art Circuitry Accommodates Magnetic Pickups
• Ultra-Low Noise Operation Improves Sound Performance
• Connects to Turntables and Other Studio Equipment
• Input Sensitivity: 3mV at 50K Ohms (Phono)
• Dedicated RCA and 1/4'' Output Connectors
• Output: 2V max (P-P) at 10K Ohms

• DC 12-Volt Power Adapter Included
• Frequency Response: 20 Hz ~ 20 KHz ±2dB
• S/N Ratio (A-WTD): 70 dB - Output Level: 2V
• Input Sensitivity/Impedance/Phono 3 mV / 50K Ohms
• Load Impedance: 10K Ohms - Reference Voltage: 1V d
• Dimensions (W x H x D): 3.54" x 2.13" x 1.02"

• AUX / Bluetooth Audio input Manual switch mode, See the product description for more details,Use DC12V/1.5A power supply(Do not use a power supply exceeding 12V)
• This is Bluetooth 5.0 tube preamp,With Bass and treble,Sound great,Satisfies your need for more sound quality! Great Warm Smooth Sounding! Let you enjoy sweet and warm sound quality
• Using the classical tube 6j1 design for easy replacement,soft voice.Adopt the Dual run amplifier chip NE5532P power conversion module
• All aluminum alloy shell,heavy gold PCB,Build quality is surprisingly solid,Nice touch!The power circuit is completely separate from the audio circuit, Minimizing interference for clear sound
• NOTE:This is a preamplifier,not a power amplifier or phono preamp, can't be used for turntables.(More technical support and help,pls ask me:www.amazon.com/hz/help/contact/A3BG62S1F23IH5# .Or leave any of your instant messaging account and I'll contact you!)

Product features

6J1 Vacuum Tube Preamplifier

With Bluetooth 5.0 & AUX switch selection;

With Treble and Bass tone control,Short Circuit Protection;Overload Protection;Overheat Protection;AIYIMA Tube T2 will give you a different acoustic enjoyment with dynamic, sweet tube sound enjoyment!

Note: T2 Preamplifier needs to work with amplifiers or active devices;

Using original 6J1 Tube Bile

Tested and matched Pair (2 tubes) of low-noise 7-Pin Vacuum Tubes,Classical Tube 6J1 Buffer Design,Higher Durability and Life.The 6J1 electronic tube can be replaced with:

6K4, 6J4, GE5654, 6*1n, 6AK5, according to different sound styles.The board layout is reasonable, beautiful, and the current is small The exterior design is delicate and beautiful!

AUX/QCC Bluetooth 5.0 Audio input selection

Bluetooth Connection:Turn on our Tube-T2,Manually Toggle to Bluetooth mode,disconnect the AUX audio input,search for our Bluetooth "AIYIMA-T2" to connect.

Please make sure the Bluetooth antenna is installed correctly(Without obstacles such as walls)

• DESIGN: OSD Audio’s Pre-1 is a unique preamplifier that accomplishes the subtle audio tasks that takes an ordinary audio source management to the next level.
• SOUND QUALITY: The Pre-1 assists in experiencing a true home theater surround sound. It allows the ear to hear every detail for an enhanced audio environment.
• POWER: A low frequency filter gives a response of 5Hz-30kHz +0 -3dB in order to have the ultimate powered preamp for a home recording or stereo system.
• CONTROLS: The front panel has adjustable mic level control, input selector, microphone jack output, and mute option. It controls the bass for midrange, treble, loudness and balance control.
• SIGNAL: A preamp is an important element for music recording to boost the low-level output on microphones. It provides a better recording signal compared to standard equipment.

User questions & answers

Question:	How would this work with a Carver M1.5 amplifier
Answer:	Yes
Question:	Can i hook it up 2 a Samsung vintage amplifier
Answer:	Yes
Question:	It is possible to amplify or equalizer the output earphones of one old tv to couple my yamaha r-s700 (3.5mm to rca connect
Answer:	No
Question:	What are the specs on this preamp? what is it's s.t.n.r. on the cd output and what is the t.h.d. percentage
Answer:	Yes

Product features

RECORDING

OSD Audio’s Pre-1 preamplifier delivers benefits to music recording by boosting the low-level output on microphones.

INPUTS

The OSD Audio preamp provides 4 selectable unbalanced analog RCA inputs: Phono, AUX1, AUX2, and CD/DVD with a ¼” Mic input jack on the front panel, featuring an adjustable mic level control.

KNOBS

The Pre-1’s other front panel variable control knobs feature 3 tone controls: Bass, Mid, and Treble, plus Balance, Master Volume, and Loudness Contour Knobs with Min to Max settings.

CONTROLS

Additional Pre-1 front panel controls include a Power Switch, Tape Loop, Mono/Stereo, Low Filter, and Mute Buttons.

OSD Audio Pre-1 High Definition Preamplifier

OSD Audio’s Pre-1 is a unique preamplifier that accomplishes the subtle audio tasks that takes an ordinary audio source management to the next level. A preamplifier is a low-level amplifier. It takes a line level signal and amplifies it enough to drive the power amplifier to its rated output. If an amp is receiving a signal at its rated output, it will perform better and your surround system will pick up detail you never thought possible.

Product description

MCM CUSTOM AUDIO 50-14820 STEREO LINE LEVEL AMPLIFIER ADJUSTABLE 0 - 15DB GAIN

• Price For: EachOrder Unit: Each 1

User questions & answers

Question:	I want to boost my ipod signal to the aux in of a car stereo. will this work for that? it has rca female input jacks on the back of the stereo
Answer:	Yes. Just keep in mind that this booster requires a power source in addition to the input and output cables. The power supply (fits in an ac outlet) is included with the device.
Question:	Can it drive 4 rock speakers from a rheostat connected to my home theater system
Answer:	No
Question:	Hi there, I have svs pb 2000 subwoofer connected to yamaha receiver and the output is way too low, i can barely hear that the sub is there.how do i co
Answer:	Its odd that your SVS pb 2000 (500WRMS 1000w peak) is too low when connected to the output of a yamaha receiver. I have exact same sub connected to line out output of a receiver (all line level outputs are about the same on all receivers) except some are a function of the receiver's volume and others are fixed volume. Either way, when my SVS pb 2000 volume is slightly over half its loud as hell, house shaking. Are you sure you have everything set/connected correctly ? Does your yamaha reciever have a dedicated bass out jack ? Something doesnt seem right. Try connecting to some other line out output on yamaha. Try disconnecting or shut off your main speakers, turn receiver volume to half way and see how loud sub really is. Does your music actually have subwoofer frequency content?? Try some modern rap or EDM music with known loud bass content. Just curious, are your speakers too loud at halfway? Anyway this little amp is extremely easy to connect. Just connect stereo RCA cable out from yamaha to input of this little amp, then connect another stereo RCA cable from output of little amp to subwoofer input.
Question:	How is it powered
Answer:	It is powered by a power adapter (included). It was a good match for my needs.

• ❤Tube MM Phono Preamplifier: Converts phono signals to Line Level Signals with low-noise integrated circuits and high-quality components to remove low-frequency noise ensure clear sound quality. Designed with grounding post to protect your turntable.
• ❤Three switchable gain modes: 39, 42, 45 dB. Adjustable gain levels to give you customizable control and outstanding compatibility. Entry-Level high-end analog sound and top-notch circuitry for an unbeatable low cost.
• ❤Tube Preamplifier: It's also a tube preamp with 3.5mm AUX Input. Designed and assembled by Fosi Audio from high-quality components. Great warm, smooth-sounding.
• ❤Applicable vacuum tube model: 6K4/6J1/6J4/GE5654/6AK5/66*In vacuum tubes, etc. You can replace the vacuum tubes to DIY your stereo system. Different tube with different sound.
• ❤What You Get: Box X2 phono preamp x1, Vacuum tubes x2, RCA cable x1, power adaptor x1, user manual x1, 18-Month global warranty, and 24-Hour quick customer service.

Product features

Tube MM Phono Preamplifier/Tube Preamp

• Power Adapter Output: 12V/1.5A
• Product Adapter Input Voltage Range: AC 110V - 240V
• Box X2 Phono Preamp DC Input Voltage: 12V
• Output Voltage Level: 600 Mv @3mV 1kHz
• SNR ≥ 98dB
• THD ≤ 0.1%
• Frequency Response: Standard RIAA
• Product Weight: 0.66 lb/300g
• Product Dimensions: 4.66 inch/3.85 inch/1.29 inch

Tube Preamplifier

Audiophile-grade amplification modules offers outstanding performance with its Low-Noise Audio Operational Preamplifiers. It's also a tube preamp with 3.5mm AUX Input. Designed and assembled by Fosi Audio from high-quality components.

Gain Adjustment

Three switchable gain modes: 39, 42, 45 dB. Adjustable gain levels to give you customizable control and outstanding compatibility. Entry-Level high-end analog sound and top-notch circuitry for an unbeatable low cost.

MM Turntable Preamp

Suitable for moving-magnet (MM) cartridges. Precise RIAA equalization. Consistent sonic performance, super low-noise. This mini preamp has stereo RCA inputs and stereo RCA outputs Connect the turntable to the RCA inputs and ground.

12V/1.5A Power Adapter

Energy-efficient and stable power supply which got authoritative certification by many security tests.

Replaceable Vacuum Tubes

Applicable vacuum tube model: 6K4/6J1/6J4/GE5654/6AK5/66*In vacuum tubes, etc.

FREE RCA Cable

Fosi Audio Box X2 preamp comes with a FREE RCA cable. Unbeatable low cost for an home audio phonograph preamp.

Product description

Technical Parameters:

Input sensitivity: 400mv

Voltage output: 2V (RMS THD <0.03%)

S / N Ratio: 94DB

Frequency Response: 12Hz-50KHz (-0.5DB)

Input Impedance: 200Kohm

Output Impedance: 600ohm

AC Input: 100V (115V)

Power Consumption: 30W

Dimension (W-D-H): 320 * 170 * 120 mm / 12.6 * 6.69 * 4.72 in (Add tube height)

Net Weight: 3.5 kg / 7.72 lb, with a packaging weight 4 kg / 8.82 lb



Package Includes:

1× tube preamp

1× Power cord

• Improved circuit; Vacuum Tube: Shuguang 12AX7 * 2 / 12AU7 * 2 / 6Z4 * 2
• Excellent scaffolding design, reasonable, regular, symmetrical device layout, strictly respect the grounding line
• Power Transformers 76 * 40 H250 0.35 sheets; Japan ALPS 16 A-type audio potentiometer
• Full aluminum chassis with wood side panel; 4 Set of stereo L/R RCA auido input, 1 set of RCA output

User questions & answers

Question:	How easy is it to replace the tube sockets in this unit? Some were screwed up on receipt and I may have damaged others replacing tubes
Answer:	Solid state, uses discrete components. Very neutral sounding and has a very open soundstage.
Question:	How many dB of gain can it add to the input signal
Answer:	I've no idea. I gave it away. It wasn't what I needed. It did work fine, but it didn't have a actual On/Off switch which was a bother.
Question:	ax7 tubes are noted for a treble shrillness. is this noticeable on this unit? can the 12ax7 tubes be rolled to lower-gain 12at7 tubes
Answer:	Yes, the RCA out on your tape deck will connect directly into the PA550 and the adjustable treble will give it more boost.
Question:	Can you tell me what size is the pot shaft for the knobs on the front - if I wanted to order nee knobs. This would be the size opening on the backsid
Answer:	Yes, plug your turntable into the PA550 phono input. Plug the output of the PA550 into the input of the SE560 then use the output of the SE560 to go to your amp or preamp. Works perfectly. When first set up, set the level controls of both units half way up.

Product description

Features: Audio / Video Home Theater Pre-Amplifier 4-Ch. Pro Audio Receiver System Connects to TVs Sound bars Speaker Systems Built-in Bluetooth for Wireless Music Streaming Front Loading CD/DVD Player Powers up to Loud Speakers Front Panel Control Center with Digital LCD Display AM/FM Stereo Radio USB Flash Drive Reader MP3 Digital Audio File Compatibility Pair Speaker Terminal Binding Posts Pair RCA (L/R) Audio Inputs Aux (3. 5mm) Input Jack 1/4'' Microphone Inputs 1/4'' Headphone Jack Subwoofer RCA (L/R) Output Optical (Digital) Audio Output Video Outputs: S-Video RCA YCbCr (Component Video) Output dB (Decibel) Level LED Display Mic Echo Treble Bass Volume Subwoofer Controls Sleek Brushed Aluminum and Metal Chassis Housing Built-in Ventilation Cooling Fan Universal Rack Mountable Bluetooth Connectivity: Works with All of Your Favorite Bluetooth Devices (iPhone Android Smartphones iPad Tablets etc. ) Bluetooth Network Name: 'BT AUDIO' Bluetooth Network Password: Not Required Bluetooth Version: 4. 2 Bluetooth Wireless Range: 40'+ ft. What's in the Box: Preamplifier Receiver Remote Control Detachable Rack Mount Brackets RCA Connection Cables AM + FM Antennas Power Cable Technical Specs: Amplifier Receiver Type: 4-Channel Power Output: 3000 Watt MAX 450 Watts x 2 @ 4 Ohm 300 Watts x 2 @ 8 Ohm Impedance: 8 Ohm Aspect Ratio: 4: 3/16: 9 Video System: PAL/NTSC Audio S/N Ratio: >90dB Frequency Range: +/-14 dB Quartz Synthesized Radio Tuner Radio Presets: 50 Station Memory CD/DVD Disc Compatibility: DVD/CD/VCD/CD-R/CD-RwithMP4 Power Supply: 115/230V, Dimensions- 16.9 Lx 13.8 W x 5.6 H inches. Sold as: 1 Weight: 22. 64 lbs.

• 3000 watt power: the PYLE 4 Channel Bluetooth home stereo receiver preamplifier is perfect for your Karaoke and home entertainment sound system. Gives you 3000W peak that powers up to 4 speakers W/ 4-8 ohm impedance let you enjoy high-quality audio
• 6 inputs: The speaker amplifier home audio box supports headphone, USB, MP3, AM/FM tuner, aux, front loading CD DVD player, 2 microphone inputs with an echo effect for Karaoke, 2 RCA Audio inputs, RCA output for a subwoofer, and optical Audio output
• Bluetooth-compatible: the professional integrated AM FM stereo receiver for home is equipped w/ Bluetooth wireless music streaming. Works w/ today’s latest devices including iPhone, smartphone, iPad, and computers W/ hassle-free receiver pairing
• E controls: the speaker sound receiver for home stereo has crisp buttons for the audio sources and selectors, Rotary knob for equalization and Master volume adjustments W/ controls for mic, echo, treble, bass, volume, subwoofer controls
• Display meter: The PYLE Bluetooth stereo amplifier Receiver preamp has a front panel control center W/ digital LCD display which shows all the functions and input used. Remote control is also included in the package for distant Audio adjustments

User questions & answers

Question:	I bought this and have 2 bt amp. 1500w speakers for it but won't work. No wire connections on speakers. Strictley bt. Is there a way
Answer:	BT on this unit only receives a connection from a music source like a smartphone.
Question:	Can i run a single subwoofer from this amp
Answer:	No! There is a subwoofer out jack, but it is only a preamp. Therefore, you will have to buy a powered subwoofer.
Question:	Are the two output jacks for the sub woofers in stereo only? I only intend on a single powered sub, but only if this unit can do so in mono
Answer:	Hi, yes the unit can handle mono powered sub. You may check other details of the unit by visiting our website pyleaudio.com. Type the model number on the search box PD3000BT for more details. Thank you.
Question:	How do I get sound from radio? I get sound from tv,mp3,cd and turn table
Answer:	Hi, please press the input button in front of the unit then choose Radio or FM. You may check other details of the unit by visiting our website pyleaudio.com. Type the model number on the search box PD3000BT for more details. Thank you.

Product features

4-Channel Home Theater Bluetooth Preamplifier

Features:

• Audio / Video Home Theater Pre-Amplifier, 4-Ch. Pro Audio Receiver System
• Connects to TVs Soundbars Speaker Systems, Built-in Bluetooth for Wireless Music Streaming
• Front Loading CD/DVD Player, Powers up to Loud Speakers, Front Panel Control Center with Dynamic VFD Display, AM/FM Stereo Radio
• USB Flash Drive Reader, MP3 Digital Audio File Compatibility
• Pair Speaker Terminal Binding Posts, Pair RCA (L/R) Audio Inputs
• Aux (3.5mm) Input Jack, 1/4'' Microphone Inputs, 1/4'' Headphone Jack, Subwoofer RCA (L/R) Output
• Optical (Digital) Audio Output, Video Outputs: S-Video RCA YPbPr (Component Video)
• Output dB (Decibel) Level LED Display, Mic Echo Treble Bass Volume Subwoofer Controls
• Sleek Brushed Aluminum and Metal Chassis Housing, Built-in Ventilation Cooling Fan, Universal Rack Mountable

Technical Specs:

• Amplifier Receiver Type: 4-Channel, Power Output: 3000 Watt MAX
• 450 Watts x 2 @ 4 Ohm, 300 Watts x 2 @ 8 Ohm
• Impedance: 8 Ohm, Aspect Ratio: 4:3/16:9
• Video System: PAL/NTSC, Audio S/N Ratio: >90dB
• Frequency Range: +/-14 dB, Quartz Synthesized Radio Tuner
• Radio Presets:30 Station Memory, CD/DVD Disc Compatibility: DVD/CD/VCD/CD-R/CD-RW/MP4
• Power Supply: 115/230V, Switchable, Dimensions (L x W x H): 16.9'' x 13.8'' x 5.6'' -inches

Bluetooth Connectivity:

• Works with All of Your Favorite Bluetooth Devices
• (iPhone Android Smartphones iPad Tablets etc.)
• Bluetooth Network Name: 'PYLE PRO'
• Bluetooth Network Password: Not Required
• Bluetooth Version: 5.0
• Bluetooth Wireless Range: 40'+ ft.

What's in the Box:

• Preamplifier Receiver
• Remote Control
• Detachable Rack Mount Brackets
• RCA Connection Cables
• AM + FM Antennas
• Power Cable

Product description

PylePro Model : PP999

Compact Ultra-Low Noise Phono Turntable

Compact Ultra-Low Noise Phono Turntable Preamp with 12-Volt Adaptor - Preamplifier

Converts Phono Signals to Line Level Signals

12-Volt DC 110V Adaptor Included

Dedicated RCA Connectors

Output Level: 2V

Reference Voltage: 1V

Load Impedance: 10K Ohms

S/N Ratio (with A-WTD): 70 dB

T.H.D. : 0.08 for 1 KHz 3 mV Input

Frequency Response:20 Hz ~ 20 KHz ±2dB

Input Sensitivity / Impedance / Phono - 3 mV / 50K Ohms

Dimensions (W x H x D):3.54'' x 2.13'' x 1.02''

Weight : 0.88 Lbs

This electronic preamplifier stands up to the test and will provide you with serious sound performance. The PP999 is perfect for bringing your studio equipment's phono-level output to a more suitable and manageable line-level output. It'll take your audio signal, amplify its strength and prepare it for further processing by your receiver or amplifier. Preamps technically provide voltage gain to your desired equipment and are key to assisting the signal source. The ultra-low noise audio conditioning circuitry allows the preamp to boost audio to levels that are more manageable for various types of audio equipment. You'll find it easier to adjust the recording level volumes of different sources and instruments alike. You should position your preamp close to the source to reduce unwanted noise and interference. Preamps can sometimes come built into the stereo equipment, but if that's not the case, the PP999 is an easy install, wise choice and great addition to any musician or producer. Take your sounds and audio production skills to the next level with the PP999 Preamplifier.

From the Manufacturer

&

	PP444	PP555	PP999	PHE300	PHE400
	Turntable / Phono Pre-Amplifiers			Noise / Hum Eliminators
Jacks	RCA & 1/4''	RCA & 1/4''	RCA	1/4'' TRS	1/4'' TRS & XLR
12V DC Adaptor	✔	✔	✔

• CONVERTS PHONO SIGNALS: A turntable preamp that converts phono signals to Line Level Signals. This state-of-the-art circuitry phono preamp can accommodate magnetic pickups with an input sensitivity of 3mV at 50K Ohms
• LOW NOISE OPERATION: Offers outstanding performance with it’s Low-Noise Audio Operational Amplifiers. The output is 2V max (P-P) at 10K Ohms. It’s better to position the preamp close to the source to reduce unwanted noise and interference
• CONNECTS TO TURNTABLES: Connect any turntable to modern sound equipment without specialized phono input for amplifying music. For the receiver, this can be connected to speakers, computers, laptops and more
• SIMPLE PLUG & PLAY: This mini preamp has stereo RCA inputs and stereo RCA outputs. Connect the turntable to the RCA inputs and ground. Then, connect the amplifier receiver to the RCA outputs

User questions & answers

Question:	If I have a record player without a Preamp, will this help me with hooking it up to a Sonos
Answer:	You can hook it up to anything with a red and white connection. Or if you get the rca to 3.5mm jack then you can hook it up to anything with an input slot. I used this on my realistic lab 440 which doesn't have a preamp. Once I connected the ground from my turntable into the ground slot on this amp, my music sounded loud and clear.
Question:	mp
Answer:	Turntables (with typical magnetic cartridges) have very low signal output (a few thousandths of a volt). Records have the bass reduced to provide enough room on the surface for the recorded grooves, and the treble boosted to reduce the surface noise level when played back. A phono preamplifier performs two jobs: - It boosts the small signal from the turntable by about 50 to 100 times (producing a "line level" signal) so it can be used by typical receivers or amplifiers.- It also boosts the bass and reduces the treble according to an industry standard (the RIAA equalization curve) to restore the signal from the record to its original frequency response.The Pyle PP999 is just an inexpensive phono preamp, nothing special. Phono preamps can range from $20 on up to whatever you're willing to pay for ultra-high quality. Some manufacturers make "USB" phono preamps that have A/D (analog-to-digital) converters built in and connect to a computer's USB port. Most of these provide "CD quality" conversion (16-bits at 44kHz or 48kHz). These may be adequate for digitizing your vinyl, but many computer sound systems can provide up to 24-bit, 192 kHz conversion depending on the software you use (much higher quality), by connecting the preamp output to the computer's line input. Don't just convert directly to MP3 files...you'll lose too much detail compared to the original vinyl sound. It takes almost no time to make an MP3 copy of a high bit-rate WAV or FLAC (lossless) file, but it'll take you an hour to make ANY digital copy of an LP, so do it the best you can the first time!
Question:	So this is a stupid question, I plug my RCA wires coming from my turntable into the Amp. But where do I plug the speaker wires into on the Amp
Answer:	TurnTable==>PreAmp==>Receiver/Amplifier==>SpeakersThe 'Pyle PP999' is the "Preamp". The Turntable is plugged into the PP999 INPUT and the PP999 OUTPUT plugs directly into any (non Phono) INPUT on the receiver. Your Receiver allows you to switch between different music-sources, contains the primary-amplifier and distributes the final sound out to the speakers(and subwoofer). The Receiver should have multiple inputs for receiving signals from eg. CD, Tape, VCR, etc. In my experience those labels are for convenience and interchangeable with the exception of a "Phono" input. NOTE: If the receiver has a "Phono" input then there's a built-in preamp. If your using an external preamp (Pyle PP999) do NOT plug it into the Receiver's 'Phono' input, it could cause damage. I plug the preamp for the turntable into the Receiver's 'VCR' or 'TV' inputs.
Question:	I have the Pyle turntable and Pyle stereo but they don't work together--VERY low sound--so is this the missing piece
Answer:	Turntables (with typical magnetic cartridges) have very low signal output (a few thousandths of a volt). Records have the bass reduced to provide enough room on the surface for the recorded grooves, and the treble boosted to reduce the surface noise level when played back. Most modern receivers DO NOT have the right inputs to deal with this signal (no "phono" input). A phono preamplifier performs two jobs: - It boosts the small signal from the turntable by about 50 to 100 times (producing a "line level" signal) so it can be used by typical receivers or amplifiers.- It also boosts the bass and reduces the treble according to an industry standard (the RIAA equalization curve) to restore the signal from the record to its original frequency response.The Pyle PP999 is just an inexpensive phono preamp, nothing special. Phono preamps can range from $20 on up to whatever you're willing to pay for ultra-high quality. Some manufacturers make "USB" phono preamps that have A/D (analog-to-digital) converters built in and connect to a computer's USB port. Most of these provide "CD quality" conversion (16-bits at 44kHz or 48kHz). These may be adequate for digitizing your vinyl, but many computer sound systems can provide up to 24-bit, 192 kHz conversion depending on the software you use (much higher quality), by connecting the preamp output to the computer's line input. Don't just convert directly to MP3 files...you'll lose too much detail compared to the original vinyl sound. It takes almost no time to make an MP3 copy of a WAV or FLAC (lossless) file, but it'll take you an hour to make ANY digital copy of an LP, so do it the best you can the first time!

Product description

Rockville PPA20 Rack Mount Pre-Amplifier

1U Rack Size

1/4" microphone input

RCA PHONO / AUX1 / AUX2 / AUX3 / AUX4 / AUX5 inputs

1/4" headphone output

RCA REC / LINE outputs

XLR master output ( left, right )

Headphone volume & Microphone volume controls

3 band EQ (Treble / Mid / Bass)

Master volume

L / R balance

Input source switch

Mono / Stereo switch

Mute

Low cut crossover control allows you to cut off certain frequencies which comes in handy when using turntables, subs, and other gear. This function will allow you to play your music louder, with lower distortion and make your speakers last longer

Treble / Bass control

Loudness compensation circuit which at low-to-medium volume boosts the bass and treble response

Tape Monitor

Ground lift switch

Unit dimensions: 18.89” x 6.49” x 1.73” inches

Unit weight: 4.43 lbs

Shipping dimensions: 20.47” x 8.46” x 4.33” inches

Shipping weight: 5.73 lbs

• Rockville PPA20 Rack Mount Pre-Amplifier. 1U Rack Size. 1/4" microphone input. RCA PHONO / AUX1 / AUX2 / AUX3 / AUX4 / AUX5 inputs. 1/4" headphone output. RCA REC / LINE outputs. XLR master output ( left, right ). Headphone volume & Microphone volume controls. 3 band EQ (Treble / Mid / Bass). Master volume. L / R balance. Input source switch. Mono / Stereo switch. Mute
• Low Cut Switch allows you to cut off certain frequencies which comes in handy when using turntables, subs, and other gear. This function will allow you to play your music louder, with lower distortion and make your speakers last longer. Treble / Bass control. Loudness compensation circuit which at low-to-medium volume boosts the bass and treble response. Tape Monitor . Ground lift switch
• Unit dimensions: 18.89” x 6.49” x 1.73” inches. Unit weight: 4.43 lbs. Shipping dimensions: 20.47” x 8.46” x 4.33” inches. Shipping weight: 5.73 lbs
• Inputs Sensitivity/Impedance. Mic: 1mV / 3 Kohms. Phono: 3mV / 47 Kohms. Tape, Tuner, CD, Aux: 150mV / 22 Kohms. Output/Impedance. Tape Rec: 150mV / 3 Kohms. Pre Output: max. 11V / 1 Kohms. Total Harmonic Distortation. Mic: less than 0.02%. Phono: less than 0.04%. Tape, Tuner, CD, Aux: less than 0.01%. Signal To Noise Ration. Mic: more than 70 dB. Phono: more than 90 dB. Tape, Tuner, CD, Aux: more than 100 dB
• Frequency Response: 5Hz . 30kHz +0, -3 dB. Bass: 12dB at 100Hz. Midrange: 9dB at 1 Hz. Treble: 12dB at 10kHz. Loudness: 9/0/+9dB at 100/1k/10kHz. Mute: 20dB. Power Consumption: 15W

User questions & answers

Question:	Is the phono input capacitance 100pf or 200pf?　the seller should answer this
Answer:	I'm not the seller. However, it does need a preamp to work with a magnetic phono cartridge.
Question:	Do i i need a better eq
Answer:	Not necessarily. If you’re more recording inclined, maybe. The dynamic range should suffice for most everyday listeners.
Question:	Can i take a regular 3.5 mm aux cord and plug it into the input and take a 3.5 mm aux cord and plug it into the output for my headphones
Answer:	Don't see why not.
Question:	My speakers are speakon so how do i use this amp to run my speakers to run my speakers as a output
Answer:	You need an amp with speakon outputs like the beringer kvm 750. That amp is 750 watt and two channels, you can get it from Amazon for 150.00 . It's a good solid amp with speakon outputs for your speakers.

Product features

Rockville PPA20 Preamp Professional 1U Rack Mount Pre-Amplifier w/Crossover+EQ

General:

• Frequency Response: 5Hz . 30kHz +0, -3 dB
• Bass: 12dB at 100Hz
• Midrange: 9dB at 1 Hz
• Treble: 12dB at 10kHz
• Loudness: 9/0/+9dB at 100/1k/10kHz
• Mute: 20dB
• Power Consumption: 15W

• ♪ HIGH QUALITY MATERIALS—The chassis of the preamplifier is made of a solid aluminum alloy material, and uses accurate and stable integrated circuits and high-quality components to eliminate low-frequency noise and ensure clear sound quality; The material of its PCB board is made of FR-4 insulation board and black immersion gold Craft, which has the characteristics of stable signal, high temperature resistance, long service life, and not easy to be oxidized.
• ♪ EXQUISITE APPEARANCE DESIGN—FX AUDIO pre-amplifier has a mini exquisite appearance and light weight, easy to carry around, its brushed texture surface and high-quality tube combine to appear more fashionable ,elegant and Classical.
• ♪ SEPARATE CONTROL OF BASS&TREBLE—The vacuum tube preamplifier can independently adjust the bass and the specific proportion components in high-frequency sound to perfectly achieve HiFi effects. At the same time it can maximize the rendering of an atmosphere like being in a music performance to satisfy your experience of different sound styles in pursuit sound quality.
• ♪ RCA INPUT & OUTPUT—From RCA output ,the preamp can also be directly connected to the audio source and active multimedia audio equipment or indirectly connected to passive audio through the power amplifier(The item includes RCA cable).
• ♪ NOTE—The item just is a tube preamp, not a power amplifier or phono amplifier. Because it is a household circuit design, the home theater tube preamp can not be used in cars, turntables or passive speakers, nor can it directly work for headphones, speakers and can not be used as a phono amplifier.(Only suitable with 12V power cord).Package Include: 1 x tube preamp, 2 x 6K4 tubes,1 x power supply, 1 x RCA cable,1 x user manual, 1 x security card/1 year warranty

Product features

In order to dedicated to serve audiophile and display our cultural concept of "enjoy music,enjoy life", FX AUDIO developed the mini electronic tube preamp.

FX AUDIO tube preamplifier is designed by using aluminum alloy shell, PCB board of black immersion gold craft and gold-plated interface, mainly to enhance the weak voltage signal from the audio source and control the sound quality to achieve the effect of beautifying the sound.

Adopt 6K4 Vacuum Tube Design

The audio preamplifier is designed with two 64K vacuum tube, which can simulate natural sound,that is soft and delicate, dynamic and pleasing, strong and powerful, and very penetrating. FX AUDIO Pre-amplifier is the best choice for the friends who have high pursue with the sound timbre. (The tube can also be replaced according to personal preference).

HiFi Sound Quality

The function of the audio quality control of the audio preamplifier is to control the frequency characteristics of the audio system to achieve high-fidelity sound quality, or to modify and beautify the sound according to the listener's preferences, but also to adjust the sound range to achieve balance Make the resolution of sound more natural and transparent.

Wide Compatibility

FX AUDIO tube preamplifier have a wide compatibility,which input can be connected to various audio source equipment, including mobile phones, computers, CD / DVD, etc. From RCA output ,the preamp can be connected the power amplifiers to use ,also can be connected directly to an active speaker.

Product description

The Best Choice for Active Speakers

More and more audiophiles find that the behavior of normal multimedia speakers cannot meet their demands, and then they choose professional active monitor speakers. However, this kind of speakers usually doesn't have a volume controller, which means a pre-amplifier is needed.

Active monitor speakers are mostly placed on the desk and used for near field listening. So they need to consider the area required for Hi-Fi pre-amplifiers (normally very big). What'more, different pre-amplifiers may differ in their timbres and this is the most bothersome issue.

As an audiophile brand, Nobsound decided to solve this problem and designed this product. Its small size won't take much place and its clean silver color suits for various usage scenarios. There is no amplifying circuit in the device and won't change the timbre, while the amplifier in the active speaker is enough to drive it. With this product, you can enjoy the most original timbre and quality of the speakers and won't be trapped in the selection of pre-amplifiers.

Specifications:

• Dimension: 148 x 48 x 80 (mm)
• Weight: 0.6 (Kg)
• Impedance: 50KΩ
• Input: RCA / XLR (selection switch)
• Output: RCA / XLR (selection switch)

Package:

1 * pre-amplifier

• This product uses the expensive ALPS 09 quadruple fully-balanced potentiometer, NEUTRIK XLR, Pro-Singnal RCA. Nobsound never be stingy in the components and materials of our products.
• This prodcut has a small size, while is still euipped with commonly-used interfaces. There is a selection switch which you can choose the fully-balanced or single-ended audio signal mode, as well as the output or input mode.
• This prodcut has no amplifying circuit and won't change the timbre. You can enjoy the most original sound of your active monitor speakers.
• Its clean black appearance suits for almost every usage scenarios.
• PLEASE NOTE: This is a PASSIVE PREAMPLIFIER. It has NO amplifying circuit.

User questions & answers

Question:	Can i use this between an amp (Topping MX3) and powered speakers to protect the speakers amp
Answer:	No. It would make more sense to use the headphone output and find a splitter to connect it to your powered speakers.
Question:	Does this preamp output +4dBu or -10dbV
Answer:	Hello. This is a fully passive preamp with no amplification function.
Question:	Is the case (including front panel) made of metal
Answer:	Yes, all metal. It is a ver solid unit.
Question:	Is the reason for this box to convert unbalanced rcas to a balanced xlr signal? it’s just for defeating possible unbalanced signal noise
Answer:	I think most people purchase this box for volume control. It has a high quality potentiometer for this purpose. It will convert an RCA input to a balanced, XLR, output. But it would probably be more cost effective, and space saving, to purchase RCA to XLR cables if that’s all you want to do.

• P1 is a Bluetooth vacuum & valve tube preamplifier and headphone amplifier. Headphone output is 160mW @32Ω and is suitable for 32~300Ω headphones and headsets.
• Classic 6J5 vacuum & valve tube can provide warm retro tube sound. It can be replaced by 6J1, 6J4, GE5654, 6AK5, 6Ж1n-EB.
• It supports Bluetooth/USB/RCA inputs from various devices like iPod, Phone, MP3, TV, Blu-ray players, Echo Dot, CD players, computer etc.
• Bluetooth 5.0 supports APT-X, APT-X LL lossless transmission. PC-USB supports 24bit 192KHz and is compatible with Windows/Mac/Linux system
• Treble & bass control can achieve different sound style. Bypass function can suspend the tone control circuit to achieve purer music experience.

User questions & answers

Question:	Can this pre-amp stay on for long periods of time without damaging the tubes? Or can the tubes be switched off & still pass through to my amp
Answer:	Tubes last around 5000 hours. They can be on all the time.
Question:	Can you run this amp with powered speakers
Answer:	Confirmed working fine with JBL Professional LSR310S Powered Subwoofer and JBL LSR305 powered monitors. Sound does seems a bit tinny, perhaps better tubes would help.
Question:	Is this a DAC as well as a preamp
Answer:	Description states a CM6642 dac. How it's wired up will make a difference, have one on order.
Question:	Can I send audio out from the rear usb port into a computer usb to make recordings on audacity
Answer:	No. the USB port is only for power and receiving data from the PC. It does not send data to the the PC at all.

Product features

Parameters

• Chip Architecture: CM6642+QCC3008+NE5532+classic 47
• PC-USB Input Sampling Frequency: 192K/24Bit
• THD: 0.01% , SNR: 103dB
• PC-USB System supported: XP/W7/W8/W10/MAC/Linux
• Bluetooth VER: 5.0
• Headphone matching impedance: 32-300Ω
• Headphone Max power output: 160mW 32Ω load
• Bass & Treble Range: ±6dB
• RCA output level: 2.3V
• Frequency Range: 20Hz-20kHz(±3dB)

Bluetooth / USB / RCA Inputs & Preamplifier & Headphone Amplifier

• Bluetooth vacuum & valve tube preamplifier and headphone amplifier
• Headphone output is 160mW @32Ω and is suitable for 32~300Ω headphones and headsets
• Support Bluetooth/USB/RCA inputs from various devices like iPod, Phone, MP3, TV, Blu-ray players, Echo Dot, CD players, computer etc
• Bluetooth 5.0 supports APT-X, APT-X LL lossless transmission
• PC-USB supports 24bit 192KHz and is compatible with Windows/Mac/Linux system

Warm Tube Sound & Replaceable Vacuum Tube & LED Selector

• Classic 6J5 vacuum & valve tube
• Warm retro tube sound
• Can be replaced by 6J1, 6J1, 6J4, GE5654, 6AK5, 6Ж1n-EB
• Tube light selector (blue / orange)

Treble / Bass Control & Bypass Function

• Support treble and bass control
• Bypas function (tone control can be turned off to achieve purer music experience)
• Bluetooth / USB / RCA input selector