I got the part quickly and reliably, the amplifier does what it should and with the expected performance, I am satisfied. Partly as the adjustment for "Gain" or "Bass Boost" are a bit frail, but have no experience in the long-term test.
Edit: Use the power amp for quite some time and had no problems, the switches have kept despite their appearance and the performance is for 2 x Visaton BG 20 sufficient.
