MATRIXSYNTH: Sequential Circuits Pro One Fully Restored SN 9580


Thursday, October 18, 2012

Sequential Circuits Pro One Fully Restored SN 9580

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"This instrument has been rebuilt from the ground up, including 40+ hours of my time as well as $500+ just put into it at Wine Country Sequential, the country’s premier Sequential Circuits specialists. I told Wine Country to “Do whatever it takes to make this synth work as though it just came off the line”. They did better than that! This instrument is truly in perfect operational condition and is ready to perform well for another 30 years. Operationally and sound wise, this synth is unquestionably a 10 out of 10.

There are two scratches on the back and a few on the bottom, other than this the unit is in great shape cosmetically. Easily 8.5 out of 10.

Work done on unit includes:
· New, custom made American Red Oak wood ends (you also get the original walnut ends)
· Every potentiometer and switch cleaned and lubed, checked for correct operation
· J-Wire keyboard fully serviced, every key’s wire and the bus bar meticulously cleaned with DeOxit and then coated with Silver Oxide to ensure years of accurate triggering
· All keys leveled out
· All keyboard bushings replaced using the “Archive Sound” Pratt-Read keyboard rebuild kit, bringing it back up to fresh from the factory action
· Case-mounted power supply completely rewired, new original-style Fuse Holder installed, new power cord installed
· 2.2uF Power Supply bypass capacitors replaced with higher V rated 35v caps
· High quality IC sockets added for several of the chips to make servicing and replacement of chips more efficient
· Replaced 4049 ICs for the Gate Controller, Sequencer and Arpeggiator
· Rebuilt Noise circuit, including replacing/socketing the 5532 Dual Op Amp and replacing electrolytic capacitors
· Replaced LM348 Quad Op Amp and TL082 JFET-Input Dual Op Amp IC chips across the board
· All oscillators tuned and calibrated per factory service manual procedures
· 2 full 50 hour Reliability Burn-In test cycles performed at Wine Country, making sure synth continue to operate flawlessly after all components reach max operating temperature

Extras: If you buy this synth, you will also receive the following extras:
· The original wood ends, power cord and case screws
· The “CAIG Audio Survival Kit”, including DeOxIT deoxidizing solution, spray and tube ProGold preservative and lubricant for plated metal connections, spray and tube CaiLube lubricant for plastic and carbon compound faders and switches, spray and tube Lint-free swabs, brushes, and cloths 5" x 8" carrying case
· Printed and Electronic versions of the Pro One Operation Manual, schematics, third party patches, more.."

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