Harman/Kardon HK 505
HK 505, Hi-Fi Amplifier from Harman/Kardon.

Harman/Kardon HK 505 : trialben's user review
Even if this amp is not trsrcent and has toured extensively it is always reliable. My first friend had bought a few years ago, who used to feed back into a nightclub! since, no problem, then it is in a wet area of the house, I do not know the price, but I know it's a good product trs!