Marantz PS4500 (2004)
The Marantz PS4500 is an AV amplifier from 2004. It is documented mostly through service manuals, schematic diagrams and a Japanese operating manual. The "PS" prefix and the pairing with the SR4500 in service literature suggest it was the amplifier/power section companion to the SR4500 surround receiver. The exact relationship isn't clearly established in the record. It could have been a separate power amp driven by the receiver's pre-outs, or a related chassis variant.
What is known: it's a multi-channel unit, described in one auction listing as a 7.1-channel amplifier. A YouTube review title reads "Marantz PS4500 đa kênh 7.1.cs 320w, pre out". The "pre out" suggests it could run as a standalone amp with an external processor. That same title hints at 320W, but the phrasing is ambiguous and can't be confirmed as a rated spec. A Pinterest listing mentions Dolby Digital support and "audiophile-grade performance," but the snippet is incomplete.
The quantitative side is thin. No power output per channel, THD, frequency response or impedance figures appear in any available source. The record does show that the PS4500 was sold in Japan. The operating manual is in Japanese, and one unit was listed on Yahoo Auctions with a 100V rating. It was in production, or at least available, in 2004. A single Yahoo Auctions bid of ¥5,500 appears in one aggregator's history, though the listed date (2026) is clearly wrong.
The service side is better documented than the specs. An 84-page service manual exists in English, and the schematic set is available through multiple repair archives. A Master Electronics Repair blog post pairs "MARANTZ SR4500 - marantz PS4500" with section labels including "DSP POWER AMPLIFIER VIDEO SERVICE MODE." That indicates digital signal processing circuitry plus a conventional power amplifier section. The Japanese manual's metadata dates to December 2005, later than the 2004 manufacturing date.
One Avito listing calls it a "specialized amplifier from Ippinkan," a Japanese audio dealer, which fits a Japan-market component. An eBay seller noted their unit "was being used without any problems until last month," and an Avito listing describes excellent condition at 100 volts. No common failure modes, restoration notes or collector market data have surfaced.
The Marantz PS4500 is a Japan-market multi-channel AV amplifier from 2004, closely tied to the SR4500 receiver. Its service documentation is solid, but almost no performance specifications have been published.
Known facts at a glance
- Type: AV amplifier / power amplifier (multi-channel)
- Year: 2004 ("2004 year made" per auction listing)
- Channel count: reportedly 7.1 (from YouTube listing title — unverified)
- Market: Japan (100V units, Japanese manual)
- Service manual: 84 pages, English, available
- Related model: SR4500 (surround receiver)
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