Triode USA Dynaco ST-70 Tube DIY Amp Kit - IN STOCK & READY TO SHIP
DIY stereo tube amp - Make:
10 Watt Audio Amplifier using Op-Amp and Power Transistors
Amazon.com: 100W+100W Amplifier Board with Treble and Bass Control, DC 9-24V, BT and AUX Inputs, 2.0 Channel Stereo AMP Board for DIY Wireless Speakers, Password Free : Electronics
New HiFi A2-PRO Professional Amplifier DIY Kit Refer Beyerdynamic A2 AMP With aluminum chassis - AliExpress
If You Can't Find It, Build It DIY Tube Amp – Part 2