MATRIXSYNTH: Sequential Circuits Pro One SN 2145


Tuesday, February 09, 2016

Sequential Circuits Pro One SN 2145

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via this auction

"It is the most desirable revision, with the chassis-mounted power transformer and J-wire keyboard. Early (pre-serial 1500) models had the power transformer mounted to the circuit board, eventually it could come loose and swing around the circuit board damaging components. The later (post-serial 8500) had membrane keyboard contacts that are known to become intermittent and difficult or impossible to repair..."

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