11 best drok audio amplifier

• Blue~tooth Board Parameter---input voltage range DC 5V-24V, support micro USB 5V power supply; blue~tooth version 4.2.
• Blue~tooth Board Input Method---3.5mm AUX input & 2.54mm 3P AUX input.
• Blue~tooth Board Output Method---3.5mm audio output & 2.54mm 3P audio output.
• Audio Amplifier Board Parameters---working voltage is DC 5V, output power is 5W (2Ω 5V)/3W (4Ω 5V) / 1.8W (8Ω 5V). Input method is monaural input.
• Audio Amplifier Board High Performance---the digital amplifier module is with high efficiency of over 90%, general harmonic distortion noise is less than 10%, low quiescent current and noise suppression.

• Parameter --- The black one: Input voltage range DC 5V-24V, support micro USB 5V power supply; blue~tooth version 4.2. The blue one: Power supply voltage: DC 5-27V, over 2A (the best input range is 8-24V), can be powered by 12V or 24V; Dual channel: Left and right channels; Output power: 50W+50W, recommended 4Ω/8Ω speakers; Blue~tooth version: 5.0.
• Application --- Headphone, speaker, home stereo system DIY.
• Input --- The black one: 3.5mm AUX input & 2.54mm 3P AUX input. The blue one: 1. Blue~tooth 5.0, as being designed with a PCB antenna, in the condition of no obstruction, the visible distance of the connection can reach 15m, but do note that it must be far away from the router when using it; 2. AUX; 3. Type-C port for USB input. When being powered on, default to enter Blue~tooth mode.
• HD Sound Quality & Volume Control --- The blue one: With the LC filtered output, the sound played by this power amplifier can be high quality, clean and pure. By effectively reducing electromagnetic interference, it won’t get much background noise. And the volume control is easy to operate: rotate to turn up or down; Short press to stop or move on; Long press to turn on or off.
• Protection --- The blue one: Anti-static, power supply anti-reverse connection, short circuit protection, overheating protection, over voltage protection, under voltage protection, DC protection.

• PARAMETER --- operating voltage DC 9V-18V, recommend DC 12V; max output power 2x35W (18V/4Ohm); can be connected 4~8 ohms speakers.
• PROPERTY --- class AB, 2.0 dual channel.
• INPUT METHOD --- 3.5mm audio cable input.
• PROTECTION --- input reverse connection protection; short-circuit protection; over-current protection; over-temperature protection.
• FEATURES --- volume adjustment knob; noble black immersion gold circuit board; KEMET speaker capacitor, large-capacity filter capacitor for channels; black copper terminal blocks; gold-plated audio input terminal blocks.

User questions & answers

Question:	Can I run this in mono
Answer:	Not without modifications. It was designed as a stereo amp
Question:	Can it be bridged
Answer:	No

Product features

Immersion Gold PCB

• Well laid out
• High performance
• Stable and reliable

High Grade Components

• Pure copper wiring terminal
• Gold-plated 3.5mm audio input socket
• KEMET audio capacitance
• High capacity filter capacitance

Volume Control Potentiometer

• Turn left to decrease volume.
• Turn right to increase volume.

Multiple Protections

• Over-current protection
• Over-heat protection
• Input reverse connection protection
• Short-circuit protection

• Amplifie's parameter --- working voltage DC 9-18V, recommend 12V; max output power 35W*2 (18V 4Ω), can be applied to 4-8Ω speakers.
• Amplifier's input --- 3.5mm audio cable input.
• Stereo audio cable length--- 3.28 Feet / 1 Meter.
• Cable property --- 3.5mm male to male audio aux cable.

Product description

Parameter:

Input Voltage: DC 9-18V, recommend 12v

Output Power: can be connected to 4-8 ohm speakers，max output 35W+35W (18V 4ohm)

Chip: TD7377pro2

Frequency range: 20Hz~20kHz, ±1dB

Input method: 3.5mm audio input/3P expansion input terminal

PCB size: 58.67*55.12mm

Overall Size (including heat sink): 90.56*55.12*26.65mm



Protection:

Power supply input reverse connection protection;

Short circuit protection;

Over current protection;

Over temperature protection



Note:

Please connect the PCB board in accordance with the wiring diagram. The power supply cannot be connected to the channel terminal, or the IC will burn.



Package Included:

1x Automotive Amplifier Board

1x 30cm 3-pin Shielding Cable

• DROK amplifier board input voltage range is DC 9-18v; output power is 30W+30W; can be connected to 4-8 ohm speakers.
• High Performance: Adopts high-grade pure black immersion gold circuit board, KEMET speaker capacitor, double NICHICON large-capacity filter capacitor per channel, high-quality monolithic filter capacitor and metal film resistor. These provide a high performance for this audio amplifier board.
• Specially-customized Terminals: The automotive amplifier module adopts specially-customized pure black copper terminals, gold-plated audio access terminals and 3P pure black terminals.
• Adjusting Knob: This dual-channel amplify module is comes with a adjustable knob, the volume can be adjusted conveniently.
• Safe Protection: The stereo amp board is designed with input reverse connection protection, short-circuit protection, over-current protection, over-heat protection, which can protect your device perfectly and extend its service life.

User questions & answers

Question:	On the "B Version" can you hook up two different inputs at the same time
Answer:	Yes. I have the aux cable input coming from a phone (playing music) and the screw terminal input coming from a microcontroller (playing sounds using an Arduino library) and both sounds can play at the same time.
Question:	Can I conect this amp. Direct to car radio
Answer:	The inputs on this amp are line (Aux) level inputs, so if you have an aftermarket car stereo, you can come out of the line level outputs (RCA jacks) into this amp. If you have a factory stereo you should NOT hookup to the speaker wires. The speaker outputs will overload the amp inputs and cause distortion. The inputs on the amp have a common ground, and this would damage most factory stereo outputs.
Question:	Is the 3P pure black audio input terminal the same as the 3.5mm input
Answer:	From the limited documentation that comes with it, yes.
Question:	can i use it on 16 ohm guitar speaker
Answer:	The data sheet for the TDA7377 doesn't say so, but in stereo bridge mode, it should not work with the design parameters. HOWEVER. Do be aware that the limit of power output is voltage on this design; even at 18V, 16 ohm speakers will probably reduce it to closer to 5W or 6W per channel. I would suggest a design that's based on 8 to 16 ohm speakers,. not a 2 to 4 ohm speaker design. Now if you had four of those speakers you could wire in parallel, it would probably work fine (since that would then end up 4 ohms effective.)

Product features

Dual Audio Input Methods

• 3.5mm gold-plated audio input socket
• 3P pure black audio input terminal

Immersion Gold PCB

• Well laid out
• High performance
• Stable and reliable

High Grade Components

• KEMET audio capacitor
• Nichicon capacitor
• Monolithic filter capacitor
• Metal film resistor
• No distortion
• Little noise

Multiple Protections

• Input reverse connection protection
• Short-circuit protection
• Over-current protection
• Over-heat protection

Product description

Features:

Three kinds of audio input: Blue~tooth receive; USB decoding play; TF card decoding play.

Power: DC5V; Effective blue~tooth transmission distance: 10-15 meters.

Support multiple formats: MP3, WMA, WAV, FLAC.

The front output can directly promote headphones or connect rear amplifier.



Key Operation:

MODE: press the "MODE" button to switch among three kinds of audio input, Blue~tooth receive; USB decoding play; TF card decoding play.

NEXT: short press the "NEXT" button to play the next song, long press the "NEXT" button to increase volume.

BACK: short press the "BACK" button to play the previous song, long press the "Back" button to decrease volume.

EQ: sound effect manager(only valid under USB or TF card playing mode).

Audio Output: for connecting headphones, active loudspeaker box or amplifier(if yours is passive loudspeaker box, please connect amplifier first).



Connection:

1. First off it's a Micro USB connection for power, powered by DC 5V, or if you want to solder your own power then you can take that route if you like. Then connect headphones or active loudspeaker box or amplifier to the audio output.

2. Open the Blue~tooth function of your cell phone or other devices with Blue~tooth audio stream output support(such as laptops, tablet PCs, etc.), please first delete other blue~tooth devices that had been connected to your phone before on your phone(or the blue~tooth connection will be unstable), and then the phone will automatically search and pair with the module, no pairing codes or button mashing needed. After a successful connection, the phone will show that the module Xpecial audio has been connected, while the LED blinks blue.



Package Includes:

1 x Blue~tooth Audio Receiver Board

User questions & answers

Question:	Can i power this with a 7.4 volt lithium battery
Answer:	If you use the correct step down module yes. There are quite a few DC to DC converters that should work. I use a 12V to 5V step down in my car to run this thing.
Question:	What version of Bluetooth does this support
Answer:	this appears to be a bluetooth v2.1 device, but it should work with any BT device.
Question:	Does it have any feedback noise when connected to the same power supply
Answer:	I just purchased it and it does have serious feedback noise in that situation while charging/powered . I have a 12v 7ah SLA battery for power . Had to order a MPow noise suppressor , hope it works . Costs $9 so add that to BT board for total $19 . Not sure if it is worth that . Mpow has a unit with built-in battery included for less .
Question:	does this have the annoying "bluetooth device is ready to pair" voice when it comes on
Answer:	Yes

• Parameters: DROK audio amplifier board working voltage is DC 5V, output power is 5W (2Ω 5V)/3W (4Ω 5V) / 1.8W (8Ω 5V). Input method is monaural input.
• Artificial Material: this New-designed mini power amplifier is made of noble black immersion gold circuit board, imported KEMET speaker capacitor, large-capacity filter capacitor for channels. Besides, we customized black copper terminal blocks and gold-plated audio input terminal blocks for this new amplifier module.
• High Performance: the digital amplifier module is with high efficiency of over 90%, general harmonic distortion noise is less than 10%, low quiescent current and noise suppression.
• Safe Protection: the class D dual-channel amp board is designed with input reverse connection protection, short circuit protection, over heat protection; what's more, EMI is allowed to pass.
• Additional Function: it is available to connect amplifier type to choose different function (MODE: high electricity level is Type D, low electricity level is Type AB. Factory defaults high electricity level); available to add an external Shutdown (SD: the chip will be Shutdown at low electricity level, factory default high electricity level.

User questions & answers

Question:	Hello, i could i safely convert the speaker output into a 3.5mm? would a usb battery be okay for power
Answer:	Yes. I believe a USB battery would be OK because if the USB battery is 5 volts it should be fine. Yes, you can use a 3.5mm jack for speaker connections. Just be careful because when plugging in a 3.5mm jack, either mono or stereo jack, there will usually be an intermittent short circuit which should not hurt the amplifier. Hope this helps.
Question:	What’s the knob shaft dimensions for cutout
Answer:	diameter 6mm =0.235'', length 10mm = 0.41''
Question:	Does it come with the knob shown in the picture
Answer:	Yes. The knob is a power switch and volume control.
Question:	What kind of battery can you power this with
Answer:	Mine has been playing continuously for an hour and ten minutes (so far) using a 3.7 volt LiPo battery. Battery was almost fully charged (4.1 volts) and is powering this little amp and a bluetooth receiver in a vintage tabletop radio converted into a bluetooth speaker. I would imagine this amp could also be powered by a single 18650 li-on battery

• Parameters: DROK audio amplifier board working voltage is DC 8-26V, can be powered by 12V, 24V; output power is 15W stereo (24V 8ohm)/ 10W stereo (12V 8 ohm), if connect 4 ohm or 2 ohm speaker, the power will be automatically limited to 15W.
• Artificial Material: this New-designed stereo amplifier module is made of noble black immersion gold circuit board, PAM8620 chip, imported KEMET speaker capacitor, large-capacity filter capacitor for channels. Besides, we customized black copper terminal blocks and gold-plated audio input terminal blocks for this new amplifier module.
• High Performance: the class D power amp module is with high efficiency of over 90%, general harmonic distortion noise is less than 0.2%, low quiescent current and noise suppression.
• Safe Protection: the 2 channel amp board is designed with input reverse connection protection, short circuit protection, over heat protection, overcurrent protection, overvoltage protection, undervoltage protection; what's more, EMI is allowed to pass.
• Additional Function: it is available to connect external mute function (MUTE: High level mute, factory default low level); available to add an external Shutdown (SD: the chip will be Shutdown at low electricity level, factory defaults high electricity level.

User questions & answers

Question:	I keep getting a ground noise, any idea what might cause this
Answer:	I used a ground loop eliminator. It's the only way to clean up the noise
Question:	Is the light still on when u turn the unit off using the pot
Answer:	If you are turning the unit off why the light will still be on?
Question:	What is the frequency response
Answer:	My best guess by ear is about 250 HZ to 15,000. It is not audiophile quality but is at a great price for what you get. Most people wouldn't be able to tell the difference.
Question:	if I were to use it in an automotive application for a center dash speaker, and wish to wire into a receiver amp turn on, would this work and how
Answer:	I have never tried to connect the amplifier in the automobile circuit. But, in my opinion, for an amplifier, it does not matter in which circuit it works. The amplifier is designed to amplify the audio signal between the receiver and the speakers. It is only necessary to observe the conditions of sufficiency of the input signal to the amplifier and sufficient current supply of the amplifier.

Product features

DROK Digital Amplifier Board

• Working voltage range DC 8-26V, canbe powered by 12v or 24v

• Output power is 15W stereo (24V 8ohm)/ 10W stereo (12V 8 ohm)

• Class D Dual Channel 15W+15W

More Amplifier Kits for your Option!

• Amplifier's parameter --- working voltage DC 9-18V, recommend 12V; max output power 35W*2 (18V 4Ω), can be applied to 4-8Ω speakers.
• Amplifier's input --- 3.5mm audio cable input/3P extension cable input.
• Stereo audio cable property --- 3.5mm male to male audio aux cable.
• Stereo audio cable length --- 3.28 Feet / 1 Meter.

Product description

TDA7297B Parameters:

Voltage：DC 9V to 18V(suggest you to use 12V DC in at lease 2A)

Power: 15W+15W

Peak power: 30W+30W

Output anti-resistance: 4 to 8 ohm

Features:

1.Adopts TDA7297 dual-channel amplifier chip; DC power supply and can use 12V battery as direct power supply

2.With potentiometer knob and heat sink on the board and can be used simply by connecting its wires

3.Working efficiency as high as 90%, quite enery-saving; the amplifier can play continuously for 5 hours with 12V motor battery as power supply

4.Has wiring terminals(please use screwdriver) and requires no electric iron for fast wiring connection

5.You can use this amp board for DIY speaker, easy and convenient; reasonable circuit design; has no impact sound and static noise

6.Its PCB circuit module adopts 1.6mm-thick FR-4 high-quality fiberglass;there are fixing holes if you want to use larger heat sink

Power supply:

Input voltage: AC 100 to 240V 50/60Hz

Output voltage: DC 12V

Output current: 2A Max

Voltage accuracy: +/- 5%(in empty load)

Power supply polarity: inside is the positive and outside is negative

Speaker Parameters:

Outer diameter: 78mm

Speaker height: 52mm

Anti-resistance: 4Ω

Diagonal screw hole distance: 83mm

Sensitivity: 90dB

Effective frequency: 108Hz to 20KHz

Hole diameter: 71mm



Package include:

1PCS TDA7297B module

1PCS Power supply

2PCS Speakers

• Blue LED indicator which lights on when the amp module power on
• With potentiometer knob, hence easy and convenient for adjustment
• Large capacitance of 2200UF and has heat sink
• 2.0 dual-channel power output of 15W+15W; can be connected to 4 to 8Ω, 10 to 50W speaker

User questions & answers

Question:	Does anybody know what size the included speakers are? they look like 2-3 inches
Answer:	Hi Steve,Thanks for reaching out. This paddle adjusts from 65"-85" so it will be great for you. At 6'4" you'll want it at about 84"-85" and will work for someone as short as 4'10".Please let me know if you have any further questions.Best, Lauralee McIntyre Director of Communications Tower Paddle BoardsMain: (866) 622-4477Direct: (858) 362-4082
Question:	Is this diy kit like will i solder all the pieces to the board
Answer:	Dont know I am sorry, but its a great board , very stable
Question:	Hi. What is the power rating of the speaker? you have not written a specific value. The speaker with 15 watts has a charge of $ 10. The speaker with
Answer:	11" x 34" x 5.5" are indicated on the board,
Question:	is there anything I can add to make these work with bluetooth
Answer:	yes, comes with everything...even a fin which I missed originally in the box. I love the way it rides.

Product description

Features:

Amplifier chip: TDA7498

Output power: 100W+100W (Vcc = 36 V, RL = 6Ω, THD: 10%)

Output power: 80W+80W (Vcc = 34 V, RL = 8Ω, THD: 10%)

Wide range single power supply: 15-34VDC(recommended 24V)

Applicable speaker impedance: 8 ohm best(4 ohm or 6 ohm also works)

Four fixed gain settings available: 25.6 dB, 31.6 dB, 35.1 dB and 37.6 dB

Adopts differential input to minimize common-mode noise

Protection: short-circuit protection, over temperature protection

With standby and mute features

High efficiency: 90%

 

Description:

The TDA7498 is a 100W+100W dual-BTL class-D audio amplifier with single power supply designed for home theater and active speaker applications. It adopts 36-pin PowerSSO packaging with exposed pad up (EPU), more convenient to mount a separate heatsink.

 

Mode:

The TDA7498 has three kinds of modes: standby, mute and normal working mode(you can set the mode by shorting the pins shown on pictures).

Standby mode: all circuits closed, at a low power state;

Mute mode: all input signals connects ground, the duty cycle of forward/backward PWM output signal is 50%;

Normal working mode: the amplifier works normally.    



Package Includes:

1 x TDA7498 Amplifier Board

User questions & answers

Question:	How loud is the amp with 4 ohm speakers
Answer:	The amp will put out amount 40 watts per channel into 4 ohms. That's plenty loud.
Question:	will a 24v 6A 120w charger work
Answer:	If you are looking at the 2x100W version, you aren't going to be able to turn it up to full volume, at some point turning the volume up will cause the audio to collapse. For the 2x100W version, you will want a supply that can provide probably 250W at least. For the 2x160W version of this you will want a 350W/400W or better supply if you want to be able to get full power out either. If you don't intend to turn it up that high you can get away with less though and this should work depending on the charger.EDIT:This power supply will run either version of this amp. They can also be found cheaper on eBay, search "24v power supply" and select one with a 15A (360W) rating or better.https://www.amazon.com/3DMakerWorld-Switching-Power-Supply-400W/dp/B00IF93H6W/ref=sr_1_2?s=industrial&ie=UTF8&qid=1486689403&sr=1-2&keywords=24v+400W
Question:	Wouks a computer power Supply work to power this
Answer:	you will need a 24volt 5amp 120watt power supply like this one available on Amazon; by MEAN WELL24V 5A 120W Regulated Switching Table-Top Power Supply
Question:	can I use 14 gauge speaker wire, or will it not fit
Answer:	I think it's too big. In any case, if you solder a short piece of wire onto the 14 GA, there won't be any measureable difference.