Marantz AV-500

A surround processor from the era when "home theater" still meant a separate box and a rat's nest of cables. This one sold for $899.

Overview

The AV-500 is one of those Marantz pieces that slips through the cracks of collector conversation. It sits right where two-channel audio started making room for multichannel film sound. HiFi-Stereo (May 1993, p.77) listed it at $899 and described it as providing Dolby Pro Logic plus ambience-enhancement surround modes. That was the standard feature set for a mid-market surround processor of the period. It let you decode LaserDisc and VHS soundtracks without buying a whole new receiver.

Know what the AV-500 is before hunting for one. It is a surround-sound processor, a separate component in the preamp/processor chain. It is not an integrated amplifier and not a receiver. It does not make power. It decides where the signal goes and how the surround information is extracted. Owners pair it with a power amp or feed it into a system that already has one. The HiFi-Stereo listing places it in the same product category as Carver's C-20v, another dedicated surround processor of the same vintage. This kind of product existed for a handful of years before receivers absorbed the function and separate processors became the province of the high end.

The feature set, as reported in the period press, centers on Dolby Pro Logic and ambience-enhancement modes. Pro Logic was the dominant matrix surround format of the early 1990s. It decoded the four-channel information matrixed into stereo soundtracks: front left, center, right, and a mono surround channel. The ambience modes are the wildcard. These were the "concert hall" and "stadium" style processing options that manufacturers piled onto surround gear in the era. Sometimes useful, often gimmicky, always a matter of taste. Treat any ambience mode as a curiosity rather than a reason to buy.

The price and the timing stand out. At $899 in 1993, the AV-500 was not cheap. It was a serious component purchase, and it competed directly against the surround processing built into receivers from the same era. The argument for buying it was separation. A dedicated processor keeps the digital and surround circuitry away from the tuner and power supply of a receiver, and it lets you keep whatever amplification you already trust. That argument still holds for anyone running a vintage two-channel rig who wants to add film decoding without giving up the amplifier stage.

The AV-500 does not have a deep collector following. It does not appear on the lists of Marantz components that command serious money, and the market treats it as a period curiosity rather than a sought-after classic. That is not a knock on how it works. Surround processors age faster than amplifiers, because the formats they decode become obsolete. Pro Logic is a 1990s format, and the AV-500 decodes it and only it. Anyone expecting modern multichannel decoding should look elsewhere. Anyone who wants to run a LaserDisc player or a VHS deck through a period-correct system will find what they need.

Condition and completeness are the practical concerns. Period surround processors frequently surface without their remote controls, and the AV-500 is old enough that documentation is thin. Confirm what is included before bidding, and expect to hunt for a manual. The electronics themselves are of the era and generally serviceable, but any forty-year-old processor with surround circuitry needs a careful listen before it goes into a main system.

For the collector building a period Marantz stack, the AV-500 is a sensible, honest addition — not a trophy, but a working component from a specific moment when Marantz was selling surround processing as a separate box. For everyone else, it is a reminder that the road to modern home theater ran through a lot of $899 black boxes that did one job and did it until the formats moved on.

eBay Listings

As an eBay Partner, we earn from qualifying purchases. This helps support our independent vintage technology research.

Related Models

• Marantz 1090
• Marantz 10B
• Marantz 1120 (1971–1977)
• Marantz 1180
• Marantz 1200B