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DIYClassD is the DIY branch of Hypex Electronics BV for audiophile lovers.
Amazon.com: Kinter K3118 Texas Instruments TI Digital Hi-Fi Audio Mini Class D Home Auto DIY Arcade Stereo Amplifier with 12V 3A Power Supply Black : Electronics
theNosta Integrated Amplifier stereo (entry level, DIY) for audio amp preamp, Audio, Soundbars, Speakers & Amplifiers on Carousell
Douk Audio Hi-Fi Class A Single-Ended Tube Integrated Power Amplifier DIY KIT | eBay
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Stereo TDA2030 Audio Amplifier DIY Kit With Tone Control V1.1
Amazon.com: 160W+160W Amplifier Board with Treble and Bass Control, DC 12-36V, BT and AUX Inputs, 2.0 Channel Stereo AMP Board for DIY Wireless Speakers, Password Free (T160HS) : Electronics
Push-pull HiFi Class AB Stereo Tube Integrated Amplifier DIY KIT 13W*2 6P14/EL84 | eBay
Amplifier DIY HiFi 200W Class AB /A Stereo Accuphase P-1000 ON MJ15024 15025 | eBay