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Vintage SAE A502 Stereo Power Amplifier - 200 Watts Per Channel Amp / 600 MonoFully tested and 100% functional; this A502 offers cool looks, great sound and more than enough power for most home stereo set ups. The original owner just recently had it gone over by a tech and it was given a clean bill of health (service receipt will be included). Cosmetically, it is excellent as well exhibiting only minor wear.SpecificationsPower output: 200 watts per channel into 8Ω (stereo), 600 watts into 8Ω (mono)Frequency response: 20Hz to 20kHzTotal harmonic distortion: 0.025%Damping factor: 125Input sensitivity: 1VSignal to noise ratio: 110dBSpeaker load impedance: 4Ω (minimum)Dimensions: 483 x 356 x 133mm
This is a respected old-school high-power amp, but at US$498 it’s clearly above the current used-market center for this type of SAE piece. With a median of US$300 and a 75th percentile of US$387, this asking price sits in ambitious territory unless the unit is exceptionally clean, recently serviced, or comes with strong provenance.
What keeps it interesting is the reputation: these are known for big, effortless drive, a sturdy build, and the kind of current delivery that still makes sense on demanding speakers. If it’s original, quiet, and fully healthy, there’s real appeal here, especially for someone who wants vintage muscle with a classic SAE look. I’d just want confirmation on service history and output-stage health before paying this kind of premium.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
# SAE (Scientific Audio Electronics)
Scientific Audio Electronics emerged from Los Angeles in 1968 when Morris Kessler partnered with Ted Winchester and Beth Winchester to pursue an ambitious goal: building the world's finest audio amplifier. Kessler had been designing and hand-building amplifiers since the early 1960s, and the partnership formalized his vision into a commercial enterprise. The company operated through the 1980s, establishing itself as a significant player in the golden age of solid-state hi-fi before ceasing operations in 1988.
SAE built its reputation almost exclusively on power amplifiers, introducing the Mark 2—a 60-watt solid-state design that earned comparison to the legendary Marantz Model 9 tube amplifier in Stereophile magazine. Beyond amplifiers, the company pioneered several audio innovations, including the world's first graphic equalizer, the first digital read-out tuner, and the first phonograph pop-and-click filter. These products reflected SAE's engineering-forward philosophy and commitment to advancing high-fidelity technology.
SAE occupies a revered position in vintage hi-fi collecting and audio history. During the 1970s, the company was synonymous with high-end solid-state amplification, competing directly with established names like McIntosh, Marantz, Pioneer, and Sansui. Their equipment commanded premium pricing—a complete SAE rack system retailed for $6,000, equivalent to a top-tier Cadillac. Today, SAE remains a collector's brand, remembered by audiophiles as a legitimate innovator that produced musically open and refined components during hi-fi's most formative era.
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