10 best drok amplifiers

• 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!

• 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

• New Version: No more women voice. We have upgraded the board replacing the women voice with beeps to indicate the connection status.
• Parameter: DROK blue~tooth audio amplifier board wide input voltage range is DC 4.5V-27V, can be powered by 12v or 24v, output power is 50Wx2, SNR is 102dB. No POP sound when powering this module, skipping song or pausing.
• 2 Audio Input Ways: user can directly connect this blue~tooth speaker board with wire~less Blue~tooth 3.0/4.0/4.1, or choose the headphone (Line in) way.
• 2 Powering Methods: the digital amplifier module is equipped with wiring blocks and DC 2.1mm socket which is compatible with most laptop’s power port.
• Protective Function: the BT amp is designed with acrylic protective shell, reverse connection protection, over-voltage protection, under-voltage protection, over-heat protection, short-circuit protection.

User questions & answers

Question:	Any way to get rid of the voice at start up and connecting to bluetooth? I keep it turned up pretty high so I can control it with my phone
Answer:	That is a gripe for me too. For a non-technical user, no. One could insert a volume control or speaker switch between the amp and speakers or if you have a microcontroller programming interface, one may be able to delete it. Otherwise, just put on your ear protection!
Question:	Does it detect aux input when an aux cable is plugged in or when the circuit is complted with whatever device you are connecting
Answer:	Switches to aux input as soon as a cable is plugged in. There is a mode button that lets you switch between blue tooth and aux inputs.
Question:	how do you use the controls if it is inside a box/home speaker
Answer:	The unit itself allows access to the controls however if you enclose the Amp inside a box or speaker the only control you would have is the Bluetooth INPUT volume. The Amp would be set at a fixed OUTPUT volume. I hope this helps to answer your question.
Question:	How many amps are required for this board? Would 12V - 6A be enough
Answer:	Unfortunately, the manufacturer does not provide very detailed specs on the internal workings of this amp, so the exact internal voltage powering the amp is unknown. Best rule of thumb I would go by in regards to power supply, is to use a power brick or direct-wire supply that provides at least 100w total watts (50w x 2). In the case of a 12v supply, I'd look for at least 9A. Under-powering the amp will not affect most listening, unless you're cranking metal at top volume. However, going with a <100w power supply can result in clipping at higher volumes. Luckily, this stuff is mostly fool-proof, so run with a brick you've got handy, and if you run into clipping/distortion at the preferred volume, find a bigger one.

Product description

DROK 30W+30W Dual Channel 2.0 Car Audio Stereo Amplifier Module



Parameter：

Working voltage: DC 9-18V, recommend 12V

Output power: 35W*2 max (18V 4Ω), can be connected to 4-8Ω speaker

Input method: 3.5mm audio cable input

Dimension: 71x64x72mm



Protection:

Power supply input reverse connection protection;

Short-circuit protection;

Over-current protection;

Over-temperature protection



Package Included:

1x Stereo Amp Module

• PARAMETER --- working voltage DC 9-18V, recommend 12V; max output power 35W*2 (18V 4Ω), can be applied to 4-8Ω speakers.
• APPLICATION --- for bookshelf speaker; for test bench; for car auto audio stereo sound system DIY
• PROPERTY --- class AB, 2.0 dual channel.
• INPUT METHOD --- 3.5mm audio cable input.
• SAFE PROTECTION --- power supply input reverse connection protection; short-circuit protection; over-current protection; over-temperature protection.

User questions & answers

Question:	RCA inputs
Answer:	NO...3.5 mm input. Get skw cables..good for the $$$$
Question:	What kind of power needs are required? How many amps
Answer:	5 amp or more current rating. I reccoment 12v digital power supply. Alitove makes good stuff.
Question:	What screws are used to secure the plastic case to the columns
Answer:	those should be included in the kit.
Question:	What chip is in this
Answer:	TDA 7377. Class AB with set gain. Recommend 12v switching power supply because 8-9 volt 5 amp power transformers are hard to come by. Higher voltage the chip gets hot. Recommend changing out the input capacitors ( the little white squares next to the chip.) but thats a challenge. My speakers don't like tubes and this little amp is just fine for my apartment. 30 watts is for 4 ohms speakers...mine are 6 so I get okay power. Recommend SKW 3.5mm cables for input.

Product description

15W+15W Audio Amplifier Board



Parameters:

Working voltage: DC8-26V, can be operated by DC 12V 24V

Output power: 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

Input methods: single-ended (default)

difference (to choose by the jumper)

Efficiency: >90%

THD (total harmonic distortion)&noise: <0.2%

Low quiescent current

Noise suppression

Size: 75.69*41.96mm

Materials: high-grade pure black immersion gold circuit board, import WIMA red sound capacitor, each channel large capacity filter capacitor. Special customized pure black copper terminals, gold-plated audio input terminals.

Protective functions: input reverse protection, short-circuit protection, over-current protection, over-heat protection, over-voltage protection, low-voltage protection, EMI.

 

Other functions:

External mute function (MUTE: High level mute, factory default low level)

External turn-off function (SD: Low-level chip turn-off, factory default high level)

To use the mute/sd function, just remove the resistance next to the MUTE welding spot and add a switch between the welding spot under the resistance and the welding spot next to MUTE/SD.

 

Stereo Speaker



Parameters:

Rated power: 15W

Impedance: 4Ω

Sensitivity: 90dB

Effective Frequency: 108Hz-20kHz

Equivalent capacity: 2.5L

Outer diameter: 78mm

Height: 52mm

Hole diameter: 71mm



Power Adapter

Output voltage: DC 12V



Package Included:

1x Audio Amplifier Board

2x 15W+15W Speaker

1x 12V Power Adapter

2x Male DC Connector

• AMPLIFIER BOARD --- working voltage DC 8-26V; output power 15W stereo, efficiency over 90%; general harmonic distortion noise less than 0.2%.
• BOARD FEATURES --- multi-protections (input reverse connection protection, short circuit protection, over-heat, over-current, over-voltage, under-voltage; EMI is allowed to pass); artificial material (noble black immersion gold circuit board, PAM8620 chip, KEMET speaker capacitor, large-capacity filter capacitor, black copper terminal, gold-plated audio input terminal blocks).
• AUDIO SPEAKER --- rated power 15W; impedance 4 ohm; effective frequency 108Hz~20kHz; sensitivity 90dB; outer diameter 78mm; height 52mm; hole diameter 71mm.
• SPEAKER FEATURES --- anti-magnetic design; blended bomb wave, strong fatigue resistance; high-quality rubber edge.
• PACKAGE INCLUDES --- 1x 15W+15W audio amplifier board, 2x 15W 4 Ohm Stereo Speaker, 1x 12V power adapter, 2x male DC connector.

User questions & answers

Question:	Where is the power supply connected to the amplifier
Answer:	Dear customer, Please refer to our wiring diagarm, power supply is connected to middle screw terminal. You can use DC plug to screw terminal connector. Best regards, DROK
Question:	Can i use 18650 lithium ion batteries to run this instead of a 12v battery
Answer:	The instructions that came with the unit says the amplifier will except 8 to 26v dc. I used 12v dc at 5 amps and it works fine. It looks like the 18650 batteries are 3.7vdc each, so you may need to connect 4 in series to get around 14.8vdc.
Question:	Does it come with speaker wire
Answer:	Dear customer, Speaker wire is not included. Best regards.

Product features

DROK Digital Amplifier Kit

• 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

• Package Included: 1x Audio Amplifier Board 2x 15W+15W Speaker 1x 12V Power Adapter 2x Male DC Connector

More Amplifier Kits for your Option!

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

Parameters:

Voltage range: DC 10-25V

Output power: 50W (Max)

Output load: 4-8 Ohm (Recommend)

Frequency response range: 14-100KHz

Signal-to-noise ratio (SNR): not less than 100DB

Switching frequency: 1.2MHz

Reverse connection protection: Yes (Positive and negative reversal is not energized.)

Quantity of channels: one left channel and one right channel



Use Notes:

1. The speaker of each channel must be connected in strict accordance with the wiring diagram. If reverse the connection, will seriously reduce the sound efficiency.

2. The current ability of external power supply 5V port is within the limits of 100mA. Super-power use is strictly prohibited.

3. Increasing the power supply voltage appropriately and using relatively low impedance speakers, can be very effective to improve the output power.

4. We recommend for adequate power supply (the current must be large enough), otherwise it cannot give play to the power of amplifier and speaker.

5. Although the product is a digital amplifier, but there still will be heating phenomenon during the use, it is normal.

Package Includes:

1 × TPA3116 Amplifier Board

• This DROK digital amplifier is operated by wide working voltage DC 10-25V with reverse connection protection.
• With a volume potentiometer, you can easily turn the voice high and down.
• Made of high performance amplifier chip, double channel stereo amplifier, 25W+25W output power.
• 4-8 ohm speakers are highly recommended for this DROK digital amplifier.
• Note: to ensure this stereo amplifier work better, please add adequate power supply (the current must be large enough).

User questions & answers

Question:	If using all channels, speakers and bass shaker are rated 50w, my safe bet would be 12v 16a
Answer:	If your speaker+bass shaker load comes to 4 Ohms, TPA3116 powered by 12V can only cleanly (1% THD) push about 15 Watts per channel before an abrupt jump into high distortion. Feeding an 8 Ohm load while powered by 12V jumps to high distortion after only about 8 Watts per channel. In either case most of your available 16A current potential is wasted. Use an inexpensive DC-DC converter to boost your power supply's 12V output to 20V or so. That will allow TPA3116 to operate into higher power levels before distortion dramatically rises. Select a boost converter rated for at least 6A output or more.
Question:	I need a mini amplifier with bluetooth 25w / ch. but exactly the very small size to fit inside a socket box. Anything to indicate to me
Answer:	This amp has the power but no blue tooth built in, if physical size is the controlling criteria, I would look to SVS, as a first stop. They may be able to direct you to a 3rd party supplier? I have several devices from them that work well. Best of luck, jerzil.
Question:	Can you provide a drawing showing the center heights of the input audio jack and volume pot
Answer:	I would take out my calipers and measure it for you but the better method woould be to buy a male or female jack and gauge your measrurements on scribed marks on a flat surface. The volume pot height is 1/2 of the standing off the plane of the pc board. Hope that help, jerzil.
Question:	Does this need a external crossover, and if it does it go before or after the amp
Answer:	Boss, Usually crossover networks go after the amp. The need for a crossover usually depends on what you want to do with it. My advice is use the unit stock and see if you like the results before spending more on gadgets. Mike

Product description

DROK 30W+30W Car Audio Stereo Amplifier Board



Parameter:

Working voltage: DC 9-18v, recommend 12V

Max output power:35W*2 (18V 4 Ohm), can be connected to 4-8 ohm speakers.

Frequency range: 20Hz~2kHz, ±1dB

Input method: 3.5mm audio cable input/3P extension cable input

Dimension: 101x64x45mm



Protection:

Power supply input reverse connection protection;

Short-circuit protection;

Over-current protection;

Over-temperature protection.



Package Included:

1x Power Amplifier Module with Case

1x 30cm 3-pin Shielding Cable

• PARAMETER --- working voltage DC 9-18V, recommend 12V; max output power 35W*2 (18V 4Ω), can be applied to 4-8Ω speakers.
• APPLICATION --- can be applied to automotive audio stereo system DIY; can be applied to test bench; can be applied to bookshelf speakers, etc.
• PROPERTY --- class AB, 2.0 dual channel.
• INPUT METHOD --- 3.5mm audio cable input/3P extension cable input.
• PROTECTION --- input reverse connection protection; short-circuit protection; over-current protection; over-temperature protection.

User questions & answers

Question:	Will this mix both inputs
Answer:	Hello there, No. It is a stereo in and stereo out.
Question:	Is it plug and play or you have to use a soldering iron for the parts
Answer:	This is plug and play. No soldering required. Assembly is required if you want build the acrylic enclosure (parts provided with the amplifier board).
Question:	Is this amp bridgeable
Answer:	No
Question:	What is the frequency range
Answer:	Hi, the frequency range of the amplifier module is 20Hz--20kHz, ±1dB.

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

DROK Blue~tooth 5.0 Audio Amplifier Board

Parameters

Power Supply Voltage: DC 5-27V, the best range is DC 8-24V.

Amplifier Chip: TPA3116D2 (Anti-interference Class D high efficiency power amplifier)

Channel: Left + right channel stereo

Output: LC filter output, high-definition sound quality

Transmission Distance: > 15m in the condition of no obstruction

Protection: Anti-static, power supply anti-reverse connection, short circuit protection, overheating protection, over voltage protection, under voltage protection, DC protection.

Adaptation Speaker: 10W-200W, 4Ω/8Ω

Output Power: 10W*2@12V, 8Ω; 20W*2@12V, 4Ω; 20W*2@18V, 8Ω; 40W*2@18V, 4Ω; 30W*2@22V, 8Ω; 50W*2@21V, 4Ω



Instruction on Blue~tooth Connection

When the Blue~tooth board is powered on, the blue LED flashes quickly and enters the Blue~tooth connection mode. Then search for XinYi on the phone, tap "XinYi" to complete the connection with an alert tone being played, and the blue LED turns strongly bright. At this time, open the phone music player to play music, the Blue~tooth LED will flash slowly which means being playing.



For other precautions, please carefully read the User Manual.



Package Includes:

DROK Blue~tooth Amplifier*1

• Parameter --- 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.
• Blue~tooth/AUX/USB Input --- This stereo amplifier board supports three types of input: 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 --- 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.
• Heat Dissipation --- Pure aluminum heat sink and shell heat dissipation, by which the large heat dissipation area to ensure high power and high performance operation.
• Protection --- Anti-static, power supply anti-reverse connection, short circuit protection, overheating protection, over voltage protection, under voltage protection, DC protection.