YDA138-E Digital Stereo Audio Power Amplifier Board DC12V 10W+10W | eBay
Yda138-e Digital Amplifier Board 20w+20w Dc 12-15v Class D Audio Stereo Hifi Amp For Yamaha Speaker Xh-m531 With Volume Control - Operational Amplifier Chips - AliExpress
YDA138-E - YAMAHA - IC Chips - Kynix
Dc12v 10w+10w Yda138-e Yamaha Digital Power Amplifier Board With Gain Adjustment - Home Theater Amplifiers - AliExpress
Yamaha YDA138 Bluetooth amplifier - Share Project - PCBWay
YDA138 Datasheet(PDF) - YAMAHA CORPORATION
YDA138(E) - A favorite among low power amplifiers with convincing sound.
PDF) YDA138 Datasheet - STEREO 10W DIGITAL AUDIO POWER AMPLIFIER