9 best tube power amplifier

A tube power amplifier is a type of audio amplifier that uses vacuum tubes (also known as electron tubes or thermionic valves) to amplify audio signals. These amplifiers are often associated with vintage and high-end audio equipment and are used in various applications within the realm of home audio and electronics. Here are some key points about tube power amplifiers:

Amplification Technology: Tube power amplifiers rely on vacuum tubes as their primary amplification technology. These tubes contain electrodes and are known for their warm and natural sound characteristics, which many audiophiles find appealing.
Sound Characteristics: Tube amplifiers are renowned for their unique sound qualities, characterized by a warm and harmonically rich tone. They are often favored for reproducing music with a more natural and pleasing sound, particularly for genres like jazz and classical music.
Output Power: Tube power amplifiers come in various power ratings, ranging from a few watts to several hundred watts. The choice of amplifier power depends on the intended application, such as small listening rooms or larger home theater setups.
High-End Audio: Tube power amplifiers are commonly found in high-end audio systems where audiophile enthusiasts seek the best possible sound quality. They are often paired with high-quality speakers to create an immersive listening experience.
Tube Types: Different types of vacuum tubes, such as triodes, pentodes, and tetrodes, can be used in tube power amplifiers. Each tube type has its own sonic characteristics, influencing the amplifier's overall sound.
Maintenance: Tube amplifiers require regular maintenance, including tube replacement when they wear out. Proper biasing and care are essential to ensure the amplifier operates optimally.
Heat Generation: Tube power amplifiers generate heat due to the operation of vacuum tubes. Adequate ventilation and proper placement are necessary to prevent overheating and ensure the longevity of the tubes and amplifier components.
Vintage Appeal: Many vintage audio enthusiasts appreciate the retro aesthetic and nostalgic appeal of tube amplifiers. Vintage tube amplifiers from the mid-20th century are often sought after by collectors and enthusiasts.
Cost: High-quality tube power amplifiers can be relatively expensive compared to solid-state amplifiers. The cost is influenced by factors such as brand, build quality, and the choice of vacuum tubes.
Compatibility: When using a tube power amplifier in a home audio setup, it's important to ensure compatibility with other audio components, including preamplifiers, speakers, and source equipment.

In summary, tube power amplifiers are audio amplifiers that utilize vacuum tubes to amplify audio signals. They are known for their distinctive warm and natural sound characteristics and are often favored by audiophiles seeking high-quality audio reproduction. Tube amplifiers require proper maintenance, generate heat, and can be relatively expensive, making them a niche choice for those who prioritize sound quality and vintage appeal in their audio systems.

Below you can find our editor's choice of the best tube power amplifier on the market

Reisong A10 EL34 Hi-Fi Audio Stereo Tube Amplifier Single-end Class - A Amp

Based on 142 reviews Check latest price

Product description

Point to Point hand welding, preferred audiophiles, output transformer switch to the 76x40 higher end output transformer.

Please pay attention before buying!! Nice sound but LOWER POWER.If you like high power or your speakers do not match, it may cause sound distortion.

Specification:

Output Power: 6W * 2 (Ultra-linear).

Frequency response: 20Hz - 28KHz.

Output Impedance: 4,8Ω.

Total harmonic distortion: ≤ 1% (1kHz).

SNR: 88dB.

Voltage amplification: 6N2J × 2.

Power output tube: EL34 × 2.

Rectifier tube: 5Z4PJ × 1.

Input sensitivity: 750MV.

Input impedance: 100KΩ (2 groups input)

Dimensions (W × D × H): 310 × 268 × 165mm.

Power Supply Voltage: AC 110V - 120V / 50Hz-60Hz (For United States)

Power consumption: 78 watts

Features:

Power Transformers: new imported 0.35, stack thickness 50MM (96-50).

Output transformer core: new imported 0.35 (76*40upgrade version).

Chassis: imported mirror stainless steel chassis.

Corners aluminum column: high-grade aluminum CNC machining, diamond knife speed car system.

Output Block: High-grade export base, with a transparent cover.

6N2J pre-voltage amplification.

EL34 as power output.

Potting type output transformer, to ensure the stability and reliability of the output transformer, especially in the southern humid places, have a more reliable performance.

Output transformer with a new imported 0.35 core manufacturing, high-purity copper wire package enameled, layered segmentation, string and connection method, divided into three clips two around the system,

Output transformer transformer housing with high-grade stretch hood. High temperature paint surface treatment, bright pattern processes. Nissan ALPS potentiometer.

Imported 0.35 thick core manufacturing power transformers, to ensure adequate power and low temperature rise.

Please pay attention before buying, We received feedback from many buyers, reflecting that Reisong A10 Amp have not enough power. Please confirm that your speaker is a bookshelf speakers with a sensitivity 89db or more. We don't think Reisong A10 work well with a floorstanding Speaker or the low sensitivity speakers.
Manual welding, preferred audiophiles, output transformer switch to the 76x40 higher end output transformer.
If there is no sound from the machine after waiting for a few minutes, Please make sure the power is connected properly. And try pressing the Black Circle Button on the back of the machine (for switching between AUX and CD modes)
Tube EL34 x 2,6N2J x 2,5Z4PJ x 1
Reisong Boyuu A10 Amp with tubes protective cover. If you need a circuit diagram, please contact us by email, thank you.

User questions & answers

Question:	Is this the one with point to point wiring and the tube cage
Answer:	To get an accurate sound-stage, with nice airy separation of instruments especially with small jazz groups, I find you MUST make sure with your hamsters or ferrets: a) they are, and always have been, feed on high quality oil and paper based feed. b) their claws are kept well clipped. If you don't do this you will get a lot of 7th and 9th harmonic distortion. This will totally mangle the slew rate of the amp, and could (even worse) lead to parasitic oscillation at high frequencies. House mice ? don't bother, I caught a few and tried them. Terrible sound.
Question:	Can I plug an audio technica record player directly into this amp or do I need a pre amp? (I don’t really understand what pre amps do
Answer:	You need to be more specific with your question: Adequate volume = ?? dB? Sensitivity of the Wharferdale speakers: ?? dB/m/watt? Room dimensions: 18x20x? feet? Is the room alive (lots of slap echo) or relatively dead (lots of soft cloth curtains, couches)? I play my music to as high as 85 dB on my 89 dB speakers in a room that is 16 x 30 x 9 that is reasonably alive (glass windows, plastic blinds, hardwood floors) and the amp drives it fine.
Question:	Can i replace 6n2j tubes with 12ax7/ecc83 tubes? in case stock 6N2J tubes go out
Answer:	Definitely, unless you are playing hard metal rock to ear splitting level. It drives my 8 ohm, 87 dB sensitivity speakers to satisfying level. Go for it.
Question:	My brother said if the tubes are removed and the unit is unplugged, it can be used as a carrier for hamsters (to take them to the vet). Is this safe
Answer:	My speakers are 89 dB sensitivity and I can hear tube hiss at 12 o'clock on the volume control if I put my ear on the drivers without music playing. Not a problem at listening position and at 12 o'clock the music is plenty loud in my biggish room (40x18x9). At 105 dB it may be a problem but I guess you won't need to crank it to 12 o'clock either. Hope that helps. Overall I am very happy with the purchase. Great value, great sound, well built amp. The support service has been quite responsive too. Good luck

Nobsound MS-10D MKIII HiFi Bluetooth Hybrid Tube Power Amplifier Stereo Subwoofer Amp USB/Opt/Coax

Based on 119 reviews Check latest price

Product description

Features:

With 5 kinds of audio input (Bluetooth, USB, Coaxial, Optical, RCA) and 3 kinds of audio output (Banana speakers, subwoofer, 3.5mm headphone), compatible with almost all audio devices such as mobile phone, notebook, PC, PSP, CD players and so on to meet the different needs of home audio systems.

Low-requency signal output is speciallyed designed to connect active subwoofer, strengthen bass sound effects to bring more shocking experience just like in the cinema. With treble and bass control to bring more delicate sound according to your own listening style.

Using 6P1 and 6N1 vacuum tubes, the sound is clear, warm, smooth and delicate, U-disk supporting lossless music formats such as WMA/WNV/MP3/FLAC to provide HiFi enjoyment.

Unique design and attractive appearance, exquisite black lacquered panel and retro vacuum tube are combined to create a luxurious and elegant artistic atmosphere, very suitable for home and desktop audio system use.

Parameters:

Audio input: Bluetooth, USB/U-disk, Coaxial, Optical, RCA

Audio output: speaker jack, 3.5mm headphone jack, subwoofer

U-disk supporting formats: WMA/WNV/MP3/FLAC

Bluetooth version: 4.2

Rated power: 25Wx2

Tube model: 6P1x2+6N1x2

Frequency response: 20HZ-20KHZ

Input impedance: 47

Output impedance: 4-16Ω

Signal to noise ratio: 80DB

Dimensions: 312*270*150mm

Net weight: 4.0KG

Package weight: 5.0KG

Packing List:

1*Tube Amplifier with Power Cord

1*Audio Cable

MKIII is the upgrade version of our popular MKII. MKIII is added with coaxial and optical inputs as well as active subwoofer output. The circuit design is also upgraded to ensure lower background noise and purer sound.
With 5 kinds of audio input (Bluetooth, USB, Coaxial, Optical, RCA) and 3 kinds of audio output (Banana speakers, subwoofer, 3.5mm headphone), compatible with almost all audio devices such as mobile phone, notebook, PC, PSP, CD players and so on to meet the different needs of home audio systems.
Low-requency signal output is speciallyed designed to connect active subwoofer, strengthen bass sound effects to bring more shocking experience just like in the cinema. With treble and bass control to bring more delicate sound according to your own listening style.
Using 6P1 and 6N1 vacuum tubes, the sound is clear, warm, smooth and delicate, U-disk supporting lossless music formats such as WMA/WNV/MP3/FLAC to provide HiFi enjoyment.
Unique design and attractive appearance, exquisite black lacquered panel and retro vacuum tube are combined to create a luxurious and elegant artistic atmosphere, very suitable for home and desktop audio system use.

User questions & answers

Question:	Has anyone compared this amp to one of the tripath T-Amps (topping, lepai, indeed, etc
Answer:	Car speakers most definitely can sound good for home use. Nathaniel doesn't have a clue what he is talking about. Will it make all car speakers sound good? No, definitely not. However, there are very high quality speakers out there that are aimed at the automotive market. Are they going to sound like $10,000 a piece speakers, no. However there isn't actually anything that has to be different between a car speaker and a home speaker, other than where it is used. I actually have some Hertz speakers in a project I've been building, and they sound great. Other high end car audio manufacturers are Morel and Focal - and yes, those speakers could also be made to sound great in the home. Unfortunately, the audio world is full of a bunch of know-nothing snobs who can hear the most incredible differences between audio setups - unless they're put in a double blind test. In particular, check out double blind tests done on amplifiers to get an idea.
Question:	Are these tubes all compatible with the u.s. ms-10d? ––– > 6p1 = 6p1p = 6n1n = 6aq5 = 6p15 6n1 = 6n1p = 6н1п = 6n1n-ev = 6h
Answer:	At the first,when you connect bluetooth,turn on it it will have a slight sound,but after a whille ,it will disappear,if still have this sound,pls check your speaker and your power supply.hope you can know it,any problem ,pls contact technical support ,thanks
Question:	Do you need a phono preamp for a turntable record player? Also, does the volume knob control the volume of headphones as well
Answer:	This tube amplifier have two input modes, AUX/ Bluetooth, you can select the input modes by the switch button,if you want to use bluetooth connect it ,pls select toggle to bluetooth modes, search our tube amplifier" aiyima T2 pro ",then connect it. And All of the bluetooth device can only connect one-to-one, not one-to-many,thanks!
Question:	Would this amp make car component speakers sound good for home use? (in boxes, of course.) they are 4 ohm, rated at 250 watt RMS
Answer:	4-8ohm

Willsenton R-800i 300B 845 Tube Single-Ended Class A Integrated & Power Amplifier Balanced XLR Input

Based on 1 reviews Check latest price

Product description

Features:

Hand welding point to point, the main circuit adopts shed welding

Two high-end EI type single-ended output transformers with high-end special technology and high-quality broadband response made of Z11 iron core.

High-voltage power supply and filament power supply independently use high-efficiency toroidal, high-power power transformers with Z11 cores and special materials.

The front stage uses one 12AX7 and two 6SN7 vacuum tubes; the driving part uses two 300B tubes to amplify the rear stage.

The front stage uses a 5U4G for rectification

The rear stage uses two 845 vacuum tubes for class A single-ended power amplification

Five groups of signal input A, B, C, (D) BALANCE, E (PREIN) This machine is specially equipped with balanced input function and pure rear stage function

Power-on high-voltage delay and mute delay function (about 30 seconds)

Infrared function remote control

Use Japanese ALPS high-end potentiometer

Easy-to-install plug-in vacuum tube shield

Peripheral power tube bias current adjustment function and power output level meter sensitivity switch

Product parameters:

Rated output power: 23W + 23W (RMS)

Machine frequency response: 12Hz ~ 35kHz (-1.5dB)

Input sensitivity:845 = 300mV

Balance input: 280mV pure rear stage: 1800mV

Input impedance: 100KΩ

Output impedance: 4Ω, 8Ω, 16Ω

Harmonic distortion: 1% (1kHz)

Signal to noise ratio: 90dB

Left and right output balance: <0.5dB

Power consumption: 380W

Use vacuum tube: 12AX7 × 1, 6SN7 × 2, 5U4GX1

300B × 2, 845 × 2

Machine volume: (440 * 410 * 275) mm

Net weight: 42kg

Gross weight: 48kg

Power supply voltage: AC 100V to 240V 60Hz/50Hz

(there is a 230V/115V voltage change-over switch inside of body)

Hand welding point to point, the main circuit adopts shed welding
Two high-end EI type single-ended output transformers with high-end special technology and high-quality broadband response made of Z11 iron core.
High-voltage power supply and filament power supply independently use high-efficiency toroidal, high-power power transformers with Z11 cores and special materials.
Power-on high-voltage delay and mute delay function (about 30 seconds)
Use Japanese ALPS high-end potentiometer

Nobsound 6P1 6.8W x 2 Vacuum Tube Power Amplifier; Stereo Class A Single-Ended Audio Amp Handcrafted

Based on 94 reviews Check latest price

This Class A single-ended vacuum tube amplifier adopts hand welding to ensure the true reality of the sound quality (with headphone amp function ASIN: B076CC92BX).
This amplifier adopts transformer parallel output to reduce its internal resistance by half and achieve doubled improvement on its power.
Using antimagnetic transformer covers to shield current interference and achieve much lower static noise.
Its sound output is full of analog style. The bass part is deep and powerful and the vocal part is sweet and intoxicating.
It has a classic and graceful appearance. The VU meters and vacuum tubes makes it more elegant and attractive.

User questions & answers

Question:	input sensitivity
Answer:	How loud it will get greatly depends on your speaker sensitivity. If you are using very efficient speakers it will fill a medium size room with sound. My speakers have a sensitivity of 99 db and it will fill the medium size living and dining room with plenty enough sound for my liking. If you are talking about a large gathering of people in a large area I am not sure this amplifier will fit your needs.
Question:	Can the VU meters sensitivity be adjusted to deflect (jump) more for aesthetic reasons
Answer:	Is this the one with point to point wiring and the tube cage?---------YES. point to point wiring and come with the tube cage.
Question:	w? Seems light. Is that enough to power a large speaker or is this amp for powered speakers only
Answer:	Most turntables will need an additional pre-amplifier to boost their signal before plugging them into the Reisong A10. However, if you happen to own the Audio Technica AT-LP60, which contains it's own inboard phono pre-amplifier, you won't need a separate phono pre-amp.
Question:	How loud can it get? Is it adequate for just bedroom listening or can it be used for a party
Answer:	Can i replace 6n2j tubes with 12ax7/ecc83 tubes? ----YES. But you please pay attention to adjusting the electronic pin position when you replace them.

Product features

Parameters

Retro Classic Vacuum Tube

5U4C * 1 + 6H8C * 2 + 6P1 * 4
Vacuum tubes can offer warm retro analog sound unlike normal digital sound.

Hand Welding & Better Sound Quality

Totally hand welding can decrease sound losses and ensure better sound quality.
Its transformers adopt parallel output design, which achieve only half resistance. It has doubled power and still keeps the features of>

Luxury Components & Multiple-Paint Transformer Shield

This amp adopts 150µV 450V Hi-Fi level BC Components high voltage capacitors.
Multiple-paint transformer shield can avoid current interference, which can get lower background noise.
Sound quality is more natural and warmer.

Gold-Plated Pure Copper Terminals

Adopts gold-plated pure copper terminals.
Speaker out binding posts can accept banana plugs and bare speaker wires.
Both 4Ω and 8Ω speakers can connect to the 8Ω and 0Ω posts of this amplifier.

Dared Original VP-99P HiFi Vacuum Tube Integrated Amplifier, Hi-end Integrated 50Wx2 Amplifier, Support Direct Power AMP, KT88,12AX7 Tube

Check latest price

Product description

Original Dared VP-99P HIFI Vacuum Tube Integrated Amplifier support Direct Power AMP

Well designed and strongly built, is selling very well in Europe, USA and Japan for about 15 years, known for its classic appearance, wonderful workmanship and fantastic sound quality.

Independent power supply for each channel. Applies special potentiometer as volume controller with low noise, and durable;

VP-99P HIFI tube amp can work well with most speakers, specially perfect to play Vocals, symphony, and classical music, definitely a good choice for audiophiles.

Our zero global negative feedback design provides the most natural feeling and huge lifelike soundstage.

AMP use:

KT88,12AX7(ECC83) TUBE.

Japan NICHICON/ELAN Capacitance, ALPS potentiometer.

Gold tube sockets, 18K gold plated connector, Gold speaker output.

Dual power setting: 110 volts and 230 volts, with Analog output meter, VU output meter.

Line1,Line2,Line3,AUX input.

15mm steel sheet stamping, vacuum tube shield.

Specifications:

Input Voltage: 110V /230V

Output Impedance: 4ohm,8ohm

Output Power: 2X50W

Input power:300W

Tube: KT88*4,12AX7*5

Frequency Response: 20Hz~20KHz

Distortion: 0.1% (10W)

Signal/Noise Ratio:>= 86dB

Input:LINE1, LINE2,LINE3,AUX

Size:19.5in*9.0in*8.6in (Width X Length X Height)

Weight:45lb

Package list:

VP-99P Tube Amplifier *1

User Manual *1

Power cord *1

White gloves *1

Wiping cloth *1

Top level quality parts, classic appearance: golden teak panel, elegant and simple, chrome plated handles, gold plated connectors, gold tube sockets, NICHICON/ELAN capacitors from Japan, ALPS potentiometer, IEC Power supply socket, 230V/115V switch.
With KT88 tubes, this AMP can deliver balanced and colorful tone , push-pull working with 30w in each channel(left or right), Can drive most home audio speakers.
The best channel isolation is provided by four over-sized transformers with independent DC filtering circuits. Two analog VU meter on the front panel to monitor the two channel output.
Another feature is that it comes with a subwoofer output, for those who want to connect an active sub to the system, a perfect choice to play vocal, symphony and classic music.
This integrated amplifier is compatible with most speakers, perfectly for vocals, symphony, and classical music, definitely a good choice for audiophiles.

User questions & answers

Question:	Does this support phono
Answer:	sorry! This product does not support the phono, Dared Uranus Vacuum Tube Integrated Amplifier support phono, I give you the link： https://www.amazon.com/gp/product/B079R1WPNX/ref=s9_dcacsd_dcoop_bw_cr_x__a_w
Question:	The power tubes in this integrated amp are kt88’s. is it capable of using the other kt types? kt120, kt150, etc. thanks
Answer:	sorry, only KT88,12AX7(ECC83) TUBE.

YAQIN MC-13S Vacuum Tube Push Pull Integrated Amplifier, HiFi Valve Tube Power Amplifier, 110V/220V, RCA Jack x 4 Input, 40Wx2 Output,with EL34(6CA7), 12AX7, 12AU7 Tube

Based on 1 reviews Check latest price

Product description

YAQIN MC-13S Integrated amplifier vacuum tube Class A amplifier 6CA7Tx4 (can use EL34×4)Pre-amp SRPP circuit 2x40W 110V/220V

Transformer use silicon steel and oxygen-free copper, to ensure a clean and strong signal from input to output with no static and an extremely low noise floor.

Specifications:

Tubes:

6CA7T× 4 (Output Tubes)

12AX7 × 2 (Voltage amplifiers and drivers)

12AU7x2
Maximum Output: 40W per channel (8Ω)
Output Jacks: Two channels with two groups gold plated jacks
Output Impedance: 4Ω and 8Ω
Input Sensitivity: 0.25V
Input Impedance: 20KΩ
Input Jacks: 4 Groups gold plated isolated RCA jacks (CD, DVD, Tape, and Tuner)
Distortion of Harmonic Wave: ≤0.9% (at 28W)
Frequency Response: 10Hz ~ 76KHz (-2dB)
Signal-to-Noise Ratio: >85dB (A weight)
Supply Voltage: AC 110V / AC 220V, 60/50Hz
Power Consumption: 220W
Net Weight: 18kg (40lb)
Shipping Weight: 22kg (48lb)
Shipping Dimension: 31.5 x 46 x 17.5cm (12.5" x 18.4" x 6.8")

Tube Amplifier Precautions

1. Tube amp must connected with speakers before turning ON. Strictly prohibit send signals to amp without connected loads(speakers) or load short circuit when the switch is ON.

2. Too high or too low power supply voltage does irreversible harm to the amp,preferably less than 5% of the specified voltage. If your mains voltage exceeds this value, often best to use with the AC power supply.

3. Temperature is higher when tube amps working, placing attention to ventilation, cooling.

4. In the boot or just shut down for a period of time (within 30 minutes) Do not spill liquid on the tubes.

5. You should take about 100h time to operate the amp, you can also use your own run-in method.

✅ Classic and graceful appearance. Beautiful heavy duty chassis (stainless steel top, steel bottom) and aluminum panel and bezels, The VU meters and vacuum tubes makes it more elegant and attractive.
✅ Push-pull amplifier provides greater output power, Class A reduce distortion,An analog VU meter on the front panel to monitor the average of the two channel output levels, 110V/220V selection.
✅ The output transformers manufactured with Japanese silicon steel sheet and high-quality enameled wire, antimagnetic transformer covers to shield current interference and achieve much lower static noise.
✅ Audiophile capacitors and high quality metal precision resistors dedicated for audio frequency, high-quality volume potentiometer and electronic components to get better sound.
✅ A perfect choice to play vocal , symphony and classic music. Its sound output is full of analog style. The bass part is deep and powerful and the vocal part is sweet and intoxicating.

User questions & answers

Question:	Does this Amp have the remote
Answer:	Dear my friend, it doesn't have remote

XDUOO TA-20 High Performance Balanced Tube Headphone Amplifier Power Amplifier Black

Based on 1 reviews Check latest price

Product description

Specification

Power supply:external electricity (AC100-240V)

USB sample rate support :16-24Bit, 44.1KHz, 48KHz, 88.2KHz, 96KHz, 176.4KHz, 192KH

Output Power: 2000mW (32Ω load)

Gain: +18 dB

Distortion: ≤0.01% (1KHz)

Crosstalk:110dB

Impedance: 6Ω ~ 800Ω

Size: 105mm x 23mm x 12mm

Weight: 410g

Package

xDuoo TA-20 Headphone Amplifier

Power Cable

Manual

Warranty Card

Can be used as an amp or separately or with other equipment to form a balanced HIFI system
Two sets of AUX input interfaces
Balanced signal input interface
Pure balance analog flavor
Strong and durable/anti-interference ability

Nobsound 6P1 6.8W x 2 Vacuum Tube Power Amplifier; Stereo Class A Single-Ended Audio Amp Headphone Amplifier Handcrafted (with Headphone Amp Function)

Based on 36 reviews Check latest price

This Class A single-ended vacuum tube amplifier adopts hand welding to ensure the true reality of the sound quality. This version has headphone output, which suits for 32Ω-600Ω impedance all kinds of headphones. The toggle on the front panel is to switch between speaker and headphones. Please connect your speakers (both 4Ω and 8Ω) to 8Ω and 0Ω posts.
This amplifier adopts transformer parallel output to reduce its internal resistance by half and achieve doubled improvement on its power.
Using antimagnetic transformer covers to shield current interference and achieve much lower static noise.
Its sound output is full of analog style. The bass part is deep and powerful and the vocal part is sweet and intoxicating.Its sound output is full of analog style. The bass part is deep and powerful and the vocal part is sweet and intoxicating.
It has a classic and graceful appearance. The VU meters and vacuum tubes makes it more elegant and attractive.

User questions & answers

Question:	I want to buy a pair of klipsch 160m’s. How do I know this unit can handle 100rms
Answer:	Yes. The cable is short, but it works.
Question:	OK, maybe I'm stupid but why does it say 2 tube when it shows 7 tubes
Answer:	Hmm that doesn’t sound right. I don’t actually understand how the battery life can be as good as it is on mine. I use it at least an hour and Up to 4 or five hours a day and rarely need to charge it. Not even once a week, I think. The battery life is forgettably good. I don’t know how you’re reading 50% battery, but 5 hrs doesn’t seem long enough at all. May be a lemon - contact them
Question:	My paradigm premier spkrs have an efficiency rating of 90 to 91 ddb at i watt input. should this tube amp satisfy my normal listening level of 95 des
Answer:	Yes its loud but I've found that the battery does not last very long at high volume.
Question:	Can you recommend a tube amp that will power a large pair of boze speakers (100/channel
Answer:	Yes it is

Product features

Parameters

Retro Classic Vacuum Tube

5U4C * 1 + 6H8C * 2 + 6P1 * 4
Vacuum tubes can offer warm retro analog sound unlike normal digital sound.

Hand Welding & Better Sound Quality

Totally hand welding can decrease sound losses and ensure better sound quality.
Its transformers adopt parallel output design, which achieve only half resistance. It has doubled power and still keeps the features of>

Luxury Components & Multiple-Paint Transformer Shield

This amp adopts 150µV 450V Hi-Fi level BC Components high voltage capacitors.
Multiple-paint transformer shield can avoid current interference, which can get lower background noise.
Sound quality is more natural and warmer.

Gold-Plated Pure Copper Terminals

Adopts gold-plated pure copper terminals.
Speaker out binding posts can accept banana plugs and bare speaker wires.
The toggle on the front panel is to switch between speaker and headphones. Please connect your speakers (both 4Ω and 8Ω) to 8Ω and 0Ω posts.

Dilvpoetry R60 Bluetooth Vacuum Tube Amplifier 6K4 Valve Digital Power Amplifier Preamplfiier 160W x 160W Buffer Preamp Treble & Bass Control (Black)

Based on 4 reviews Check latest price

Product description

Dilvpoetry R60 Bluetooth Vacuum Tube Amplifier 6K4 Valve Digital Power Amplifier Preamplfiier 160W x 160W Buffer Preamp Treble & Bass Control

Parameter:

Input sampling rate supported by PC-USB: 192K/24Bit

PC-USB supported operating system: XP/W7/W8/W10/MAC/linux

Speaker matching impedance: 4-8Ω

Maximum output power: 160W*2 4Ω load

Treble and bass adjustment range: ±6dB

Input sensitivity: 0.775V

Frequency response: 20Hz-20kHz (±3dB)

Distortion: 0.1%

Bluetooth version: 5.0

SNR: ≥98dB

Working voltage: DC24-35V

Accessories:

1xUSB cable

1x optical cable

2x Tube 6K4

1x Bluetooth antenna

1x power adapter

1x protection board

1x manual

Silver: black/silver

Unit size: 168*118*36MM (L*W*H)

Weight: 0.6kg

Packing size: 300*270*75MM (L*W*H)

♫ Warm Sound Quality：Adopt tube 6K4 to get clear and warm sound,tube 6K4 can be change the tube for 6J1/6j4/GE5654/6ak5/6*1n,the sound will be different with different tube.
♫ Powerful Internal Chips：Core chip is TPA3116D2,also uses CM6642 QCC3008 6A2 chips,op-amp uses NE5532 with good extension.
♫ High Performance：160W*2 high power output, can push the floor box; Bluetooth supports APT-X high-fidelity protocol; PC-USB supports 24bit/192kHz.
♫ Multiple Audio Interfaces：Input has Gold Plated RCA terminal + Bluetooth 5.0 + PC-USB；Output has gold plated speaker terminal.Also has Treble and Bass adjustment button.
♫ Delicate and Compact Design：Aluminum alloy shell,gold-plated interface.It is suitable for Bookshelf/Computer/Desktop/Theater audio system,etc.