A Hi-Fi linear Class AB amplifier with Bluetooth v4.0 compatibility and enhanced/3D stereo playback. Watch the video guide about it here: https://youtu.be/7peg0jiGp7A
- Very low THD (~0.02% @8ohm)
- High output power (~25.7w x2 @4ohm)
- Low cost design
- Simple PCB layout
- PCB uses very common passive componants
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For the PCB components, please see the BoM located in
/BoM -
Black box ($9.58): https://amzn.to/3PJ2Jeg
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5.5mm barrel plug (~$0.60 each): https://amzn.to/3K8r4Zr
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TDA7375AV ($6.43): https://bit.ly/3K4w6Go
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Heatsinks (~$3.00): No link since they came from salvaged electronics. Price is an estimated value.
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B0505S-1W (~$2.40 each): https://amzn.to/3wcbdDy
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KRC-86B v4.0 ($9.99): https://amzn.to/3pxKD3W
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Power switch (~$0.47 each): https://amzn.to/3AyoTv9
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Other PCB componants (~$6.00 total): No link since there are a variety of passive components. Price is an estimated value.
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3.5mm audio jack (~$1.75 each): https://amzn.to/3AymmkJ
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Speaker wire terminals ($4.19): https://amzn.to/3QCLaxC
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TIP31C (x2, $1.46): https://bit.ly/3c4znce
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Custom PCB (~$4.00): Price is an estimated average and can vary on the basis of where you get it manufactured and other characteristics such as the solder mask.
Estimated total component cost (No tax or shipping costs included): $49.87 USD
*All components were priced on 7/25/2022. Prices of the components above are subject to change according to each seller's policies and inflation.
You will also need a 16v 4.5A power supply. This is not calculated in the price list above. Here is the one I used for this project: https://amzn.to/3c4339q
- Box hole dimensions (measured from center of holes): 97mm x 56mm
- PCB board dimensions: 110mm x 70mm
- PCB screw holes diameter: 4mm
- Heatsink clearance in box (L x W x H): 84mm x 25mm x 76mm
- Required drill bits: 5mm, 8mm, 12mm
This repository is licensed under the GPL v3.0 license. Any images in this repository are licensed under CC BY-SA 3.0.