Maxim MDS-1000 Analog Drum Brain - Simmons SDS V Clone

via this auction

via the seller:

"This is a mighty piece of engineering.
In a time when analog filter chips were plentiful, and XLR connectivity apparantly grew on trees, a company in Japan no-one has really heard of since (not the Maxim that made pedals) decided skimp on R&D and just Clone the leading competition with a product almost identical, but "unique" and "different"...

Each card has an SSM2044, some 3080s and a few other nice pieces. Some of the digital chips (patch switching for example) might be a bit flaky... There's no MIDI, the triggers work at different velocities. You could use all the outputs on the PTX8 I'm selling to drive this. It kind of works (I tried it once)."

inside a Maxim MDS-1000

Also see the seller's 24 Unit Rack.