This amp has been serviced and works like NEW!! All circuits have been meticulously checked and biased. All circuit voltages were adjusted by schematics. It produces pure 30W per channel RMS. The signal is crystal clear, without any noise or hum. It has warm tube sound and yet very powerful. Will consider trades for vintage stereo stuff, like turntables (old Dual, Thorens, Garrard, etc.), vintage speakers, amps, preamps, etc. -working or not! Also willing to buy high quality vintage stereo stuff, including tube gear.