Seventh Circle Audio A12 (API) Preamps (6) in Custom Chassis with upgr - $2,000 (Morro Bay)

Seventh Circle Audio A12 (API) Preamps (6) in Custom Chassis with upgr 1

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Six (6) Seventh Circle Audio API Style A12 preamps in custom inner tube chassis, with star-grounded power connection for each module.
Note: this is not a Seventh Circle Audio Chassis, but a custom upgraded chassis.
Room for two more classic SCA Modules that would need to be star-grounded and connected to xlrs on installation.
Comes with Custom Power Supply in fabulous looking metal enclosure.

"The Seventh Circle Audio A12B is a simple, single stage preamp roughly based on classic American designs of the early '70s. Built with the suggested transformers and op-amp, the result is an amplifier with an aggressive midrange and pronounced transformer coloration. The A12 sounds fantastic with rock drums and electric guitars, but is versatile enough to be used with a wide variety of source material and microphone combinations. "

post id: 7929737364

posted: 2026-04-23 14:27

updated: 2026-05-06 11:53

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Seventh Circle Audio A12 (API) Preamps (6) in Custom Chassis with...

Six (6) Seventh Circle Audio API Style A12 preamps in custom inner tube chassis, with star-grounded power connection for each module. Note: this is not a Seventh Circle Audio Chassis, but a custom...