Rare 1974 Korg 800DV Maxi-Korg Lands on Reverb, Fully Serviced

The Korg 800DV has always been one of those instruments that serious collectors talk about but rarely see in the wild. When Good Mark posted a fully serviced example on Reverb on March 19, 2026, it was the kind of listing that stops the scroll.

The 800DV, marketed as the Maxi-Korg when Korg released it in 1974, was one of the earliest attempts at dual-monophonic synthesis. Two independent voices, each with its own filter and envelope, packed into a single keyboard. It predates the Minimoog's widespread adoption in Japan and sits in that peculiar transitional moment when manufacturers were still figuring out what a synthesizer was supposed to be. Finding one intact is difficult enough; finding one that has been properly serviced is genuinely rare.

The work was done by a vintage-synth service lab in Tokyo, completed in March 2026. The listing emphasizes the thoroughness of that service, which matters enormously on an instrument this age. Fifty-two-year-old analog electronics are not forgiving. Dried-out capacitors, oxidized contacts, and drifting trimmers are the norm, not the exception, on unserviced units from this era. A Tokyo provenance for the service work is also meaningful: Japan has maintained a stronger culture of analog synthesizer repair than most markets, and specialist labs there often have access to both the technical documentation and the institutional knowledge that Western shops lack.

Good Mark has positioned this as an international listing, which makes sense. The collector market for early Korg hardware skews heavily toward Europe and North America, where the Maxi-Korg name carries nostalgic weight and where buyers have been chasing pre-ARP, pre-Sequential Korg pieces for years. Shipping a keyboard of this vintage internationally is never casual, but the serviced condition at least means the instrument arrives ready to play rather than ready for another round of bench work.

For anyone who has been hunting a dual-mono setup from this period, the 800DV represents something that no later Korg model replicated in quite the same way. Its character sits closer to the idiosyncratic European monosynths of the mid-1970s than to the cleaner Japanese designs that followed. That Tokyo service lab certification is the detail that separates this listing from the parts-or-project units that typically surface when early Korg hardware appears.