2.1 Channel Bluetooth Amplifier Circuit Board PCB 110W Stereo Sound Power Amp with Subwoofer LM1875 TDA7294 JDY-62A DIY
The product is a blank PCB. There are no components on the this circuit board.
PCB Features:
-2 Layer PCB
-Material:FR-4,
-Copper Thickness: 1oz
-PCB Surface Finish: HASL with lead
-Colour: Blue
-Dimensions: 100 x 100 x 1.6 mm
Super quality PCB. Solder pads are corrosion resistant. Soldering quality is very important in audio and high-frequency circuits. Thanks to the quality lead finishing on the Pads on the PCB, the soldering process is high quality. PCB quality greatly increases the operating performance of such circuits.
*This is a bluetooth 2.1 amplifier with a simple and compact design that only requires 3 chip-amp ICs, namely LM1875 as the satellite and TDA7294 for the subwoofer amplifier.
*The subwoofer's cut freq can be adjusted by turning the available trimpot.
*There is a separate volume control for the satellite and volume for the subwoofer.
*This amp includes a bluetooth receiver system at its input, and for the bluetooth module it uses a third-party bluetooth module, namely JDY-62A which is cheap and can easily be found in the market.
*This 2.1 bluetooth amp requires a symmetrical 18V-0-18V transformer at least 5A because this amp can give total power about 110W pure (20W+20W satellite and 70W subwoofer)
You can access installation of the circuit, bill of materials, schematic and all the technical details in the video.
Video:
youtube.com/watch?v=PwrSBiZaW7U
![](https://ae01.alicdn.com/kf/Uf189346f1f9542ddb90d8c7f2d300193T.jpeg)