Pioneer A-115
A model number with almost no paper trail.
Overview
Some gear arrives at the archive with a thick folder: service manuals, period reviews, owner threads, auction records going back twenty years. The Pioneer A-115 arrives with an empty folder. No manufacturer documentation naming this exact model has surfaced, no production years have been confirmed, and no original price is on record. What exists is a model number that sits in the Pioneer amplifier lineage with nothing confirmed behind it.
This page is short on purpose. The archive's rule is simple: absent documentation means unknown, not absent. Nothing here is evidence that the A-115 lacked a particular feature, shipped in a particular year, or sold at a particular price. Those facts just haven't been checked against a source that names this exact model. Collectors who own one and can photograph a rear panel, a serial plate, or an original carton can move this entry forward.
One caution, because it trips up researchers constantly: the model number "A-115" shows up in period print in contexts that have nothing to do with a Pioneer integrated amplifier. A 1991 HiFi-Stereo (May 1991, p.96) product notice lists an "ALLISON AL115" two-way speaker - a different brand, a different product category, and a different number. Anyone searching old magazines for "A-115" will hit that listing and others like it. It is not this amplifier. The same goes for the PDF excerpts floating around. The service-manual chunks that carry an A-115 attribution in the index are actually Collins radio gear (635V-1, 310V-1, AN/PRC-47) and Hewlett-Packard instruments (428B, 6823A). Those documents do not name a Pioneer A-115 anywhere in their text, and none of their specifications belong to this page - not the 100-watt PEP transmit output of the AN/PRC-47, not the 115/230-volt input arrangements of the HP instruments, not the 45-450 cps power supplies of the Collins exciters. They have been excluded rather than borrowed.
What Would Fill This Page
The gaps are total, so here they are in detail, for anyone with documentation. First, identity: whether the correct designation is "A-115," "A-115D," or "A-115 II" has not been confirmed, and that matters because Pioneer used suffix letters to mark genuinely different revisions. Second, the basics of any amplifier entry: power output per channel, rated impedance, frequency response, total harmonic distortion, signal-to-noise ratio, and the input and output complement. Third, physical data: dimensions and weight. Fourth, production years and original list price. Fifth, circuit and design details. Sixth, owner reception and known failure points. Seventh, current market values.
Until that material appears, the archive will not guess. A fabricated "45 watts per channel into 8 ohms" reads exactly as authoritative as a verified one, and a wrong number on a reference page is worse than a blank field, because it gets copied. The same logic rules out inferring a production decade, a cabinet finish, a faceplate material, or a position in Pioneer's lineup hierarchy. The brand catalog lists roughly two hundred Pioneer components already documented here, from the SX-1980 receiver to the PL-12D turntable to the A-20 and A-400 amplifiers. None of those entries supplies a verified relationship to the A-115.
What can be said is narrow: the A-115 carries a Pioneer model number in the "A" amplifier series, and it is a piece of audio equipment rather than a camera or a synthesizer.
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