MATRIXSYNTH

AnalogExplosion

YouTube via MAKEN0ISE
"My nephew helped me patch this cool analog explosion sound effect, using just 3 modules. Long live the QMMG!"

via this auction

auction details:
"The Syndrum analog drum synthesizer was developed by Joe Pollard and Mark Barton back in the 1970's. Eventually their company Pollard Inc. gave way to Research Development Systems, Inc. who manufactured the Syndrum CM.

Although the Syndrum is capable of many different sounds, the one that caught on was that descending "dooooooom" as heard on "Poor Pitiful Me" by Linda Rondstat and "Baker Street" by Gerry Rafferty. I used it to create my own custom Kick and Tom drum samples which I used separately or mixed in to augment the sound of real drums."

Yamaha DX5

via this auction

Not the best shots, but you don't see these often.

"Rare 76-key Yamaha DX-5 from 84 or 85. Has the power of two DX7s in one. You can do a single voice, or layer two or split. Has separate outputs for each voice. Has a large back-lit LCD and more on-surface buttons for editing than a normal DX7."

The auction states "basically the same as a $3,000 DX1 without the extra 150 lbs of wood and lights." The lights that display the algorithms on the DX1 are pretty nice though... See this post and this post.