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Heathkit AA-1600 Power Amplifier and AP-1800 Pre Amplifier. The power amp works fine but the pre amp requires service. Connections and knobs have static. Sold as a pair. A very rare find.
This US$765 asking price for a used Heathkit AA-1600 is ambitious, clearly exceeding the typical used market range of US$200 to US$400 for this power amplifier. While recent listings show similar units selling as a "stupid smart buy" at US$219 and restored examples around US$400, this price sits well above the 75th percentile, making it a tough benchmark unless the condition is pristine or includes rare accessories.
The Heathkit AA-1600 is a well-regarded vintage power amplifier known for its 125 Watts RMS per channel, exceptional clarity across the musical spectrum, and robust specs like a damping factor greater than 50 and intermodulation distortion under 0.05%. It excels with demanding speakers and delivers clean, smart sound that rivals more costly modern amps. However, given the ambitious price, buyers should verify the original-owner condition, confirm no bias or capacitor issues, and ensure all accessories are included before committing, as this is a fair buy only if the unit is truly exceptional.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Heathkit traces its origins to 1911 in the United States, when Edward Bayard Heath founded an aircraft company in Chicago after acquiring the Bates Aeroplane Co. Renamed E.B. Heath Aerial Vehicle Co., it pioneered kit-built planes like the 1926 Heath Parasol. Following Heath's death in a 1931 test flight, Howard Anthony acquired the bankrupt firm in 1935, shifting focus to aircraft accessories in Benton Harbor, Michigan. Post-World War II, Anthony pivoted to electronics in 1947 with surplus parts, launching the iconic O-1 oscilloscope kit for $50—a bestseller that birthed the Heathkit brand and its DIY ethos.
In hi-fi audio, Heathkit earned acclaim for tunable amplifiers, integrated receivers, preamplifiers, tuners, and speaker systems, all sold as meticulous assembly kits from the 1950s through the 1970s. Standouts included the AA-151 and A-7E power amps, known for their robust tube and solid-state designs, alongside full stereo systems like the AR-15 receiver. The brand expanded into test gear and amateur radio but prioritized high-fidelity components for home enthusiasts.
Heathkit occupied a mid-tier market niche, delivering exceptional value through user-assembled kits that rivaled factory-built rivals at half the cost. Prized for reliability, customization, and warm sound signatures, these vintage pieces command collector status today among audiophiles restoring "kit-built" icons. Though production ceased in the 1980s after Zenith's acquisition, Heathkit's legacy endures as a cornerstone of DIY hi-fi heritage.
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