Pioneer A-500
A model number that turns up on more than one kind of black box. The archive can't yet confirm which one this page is about.
Overview
This page is a placeholder. The Pioneer A-500 is an ambiguous designation. Pioneer reused similar model numbers across different component categories and regional markets, and the research file behind this entry came back empty. There is no spec sheet, no owner's manual scan, and no period review that names the exact variant. Until that's sorted out, anything written here about power output, circuit topology, or production years would be guesswork dressed up as documentation, and the archive tries not to do that.
The archive does have a stack of source material that *mentions* an "A-500," and it shows how badly model numbers can collide. A 1961 Harman-Kardon advertisement lists an "A-500" as a 50-watt stereo amplifier in its Award Series, priced at $159.95 alongside the 30-watt A-300 at $99.95. A 1983 High Fidelity (April 1983, p.43) piece describes a Pioneer A-500 integrated amplifier with a continuously adjustable loudness control and independent record-out and source-in selectors, noting that a related model in the same lineup was rated at 55 watts. A pair of 1971 Pioneer speaker advertisements tout the CS-A500 and CS-A700. Those are loudspeakers, not amplifiers, and they share nothing but a number with either of the above. That makes three product categories, three different decades, and one recurring string of characters.
A casual search for "Pioneer A-500" will surface all of it mixed together, and a careless writeup would blend a Harman-Kardon power rating into a Pioneer amplifier's spec sheet. The archive isn't going to do that. The High Fidelity mention is the closest thing to a period source that ties an A-500 to Pioneer, and even that is thin. It appears in passing, in a roundup of integrated amplifiers, without a full measurement suite or a standalone review. It's enough to suggest that a Pioneer A-500 integrated amplifier existed and was on the market by early 1983. That's roughly where the documented trail ends.
If you're hunting a Pioneer A-500, confirm the exact designation before you buy. The suffix, the market and the product category all matter. A listing that says "Pioneer A-500" without further qualification could be describing an integrated amplifier, or it could be a mislabeled listing for something else entirely. Photographs of the actual unit, the rear panel, and any original documentation will tell you more than the model number alone.
The archive would rather publish a short placeholder than a long page built on the wrong product. When proper source material surfaces, such as a service manual, an owner's manual, or a full period review naming the exact variant, this entry gets rewritten from the ground up.
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