Vintage Heathkit Daystrom AA-100 Integrated Stereo 7591 Tube Amplifier
Sunday, October 12th, 2025








Vintage Heathkit Daystrom AA-100 Integrated Stereo 7591 Tube Amplifier. I tested the amplifier and it is not functional. It does power on, the vacuum tubes are warming up, but there’s only humming noise can be heard from the speaker system. It definitely needs new capacitors. All vacuum tubes are present, as well as all original knobs and regulators. Everything is intact except the fuse holder which is located on the back panel. The amp is clean and looks very nice cosmetically. Please refer to all pictures I took from different angles. Power output: 25 watts per channel. Frequency response: 30Hz to 15kHz. Total harmonic distortion: 0.5%. Input sensitivity: 1.5mV (MM), 200mV (line). Signal to noise ratio: 55dB (MM), 70dB (line). Speaker load impedance: 4? To 16? Valve complement: 2 x EF86, 4 x 12AX7, 2 x 7199, 4 x 7591, 1 x GZ34. Dimensions: 15.25 x 5 x 13.5 inches.

























