A shame that H & K did not make a 30 or 40 W.
Very simple and effective
Bought in 1997, I was looking for a versatile amp, not too big. In the IDAL, I had several products amp to fill my happiness. APRS several tests brand prices trs variants, I came across this H & K tube 20. It was magical! and purchase TRS was the same day. An amplifier that meets all styles of music.
I love it and it lasts for 13 years. I would not change it against another. Trs warm clear sound and pure style jazz, blues.
Sound saturated rock blues style ACDC but not trash metal.
A real treat !!!!!