For sale is the combo unit of Heathkit's vintage Amp and Preamp duo the ; AP-1800 and AA-1600. The AP-1800 is the deluxe preamplifier/control unit, and the AA-1600 power amplifier. These are both vintage pieces from the late 1970's era of home audio reproduction. They are designed to work together as the preamplifier really acts as a control center - switching all input and speaker selection as fed back into the pre from the amp. These were both state-of-art, and at the top of Heathkit's audio offerings in 1979. At the time, I was a young grad student, and so they were far from my buying $$ reach at the time.
The amp is rated at 125watts minimum RMS/channel into 8ohms, with less than 0.05% THD, from 20-20,000Hz. The preamplifier has equally impressive specs as well. Both of these pieces are extremely clean, with no missing knobs or switch handles. These are both functional, and did produce music before going into storage about 8 yrs ago. While functional, they will still require a good cleaning of the pots, and possibly repair/replacement of some of the front-end transistors in the amp(I believe). I had some distortion in one channel that I never got around to addressing.
Included with the sale are the original Heathkit build, test, and operation manuals - along with large fold-out schematics - and pictorial build illustrations for both pieces. Please refer to all posted images of both.
I'm asking $550 for the pair. All sales are final. Local pickup only.
Thank you for looking.
Edit: Since posting I've discovered there is an issue with the preamp. No output on the left channel. I suspect it is either a faulty mode switch, or in the left-channel circuitry. I have adjusted the price to $410 for the pair.
The amp is rated at 125watts minimum RMS/channel into 8ohms, with less than 0.05% THD, from 20-20,000Hz. The preamplifier has equally impressive specs as well. Both of these pieces are extremely clean, with no missing knobs or switch handles. These are both functional, and did produce music before going into storage about 8 yrs ago. While functional, they will still require a good cleaning of the pots, and possibly repair/replacement of some of the front-end transistors in the amp(I believe). I had some distortion in one channel that I never got around to addressing.
Included with the sale are the original Heathkit build, test, and operation manuals - along with large fold-out schematics - and pictorial build illustrations for both pieces. Please refer to all posted images of both.
I'm asking $550 for the pair. All sales are final. Local pickup only.
Thank you for looking.
Edit: Since posting I've discovered there is an issue with the preamp. No output on the left channel. I suspect it is either a faulty mode switch, or in the left-channel circuitry. I have adjusted the price to $410 for the pair.
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Absolutely 'GREAT' price on the pair. I wouldn't sell my pair for twice that; seen a pair of these priced at over 3x that, and sold.
That is a great deal. Outstanding amp and a great preamp. I used to have the full rack of Heathkit. Sold off all but the AA-1600 and then picked up an AA-1800. Good luck with the sale.
Great meeting you today and chatting redjr!
Looking forward to giving these Heathkit pieces some TLC after I clear my bench of a couple Class A amps.
Happy New Year! 🥳
Looking forward to giving these Heathkit pieces some TLC after I clear my bench of a couple Class A amps.
Happy New Year! 🥳
