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Seventh Circle Audio
High quality DIY and fully assembled microphone preamplifiers and other professional audio recording gear. Made in the USA
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SCA Documentation
Click Here to Go to 500 Series Documentation!
N72 BOM
N72 Schematic
N72 Assembly Instructions
A12B BOM
A12 Schematic
A12B Assembly Instructions
J99 BOM
J99 Schematic
J99 Assembly Instructions
C84 BOM
C84 Schematic
C84 Assembly Instructions
T15 BOM
T15 Schematic
T15 Assembly Instructions
S90 BOM
S90 Assembly Instructions
S90 Schematic
S90 PCB Overlay
H32 BOM
H32 Schematic
H32 Assembly Instructions
H32 PCB Overlay
D11 BOM
D11 Schematic
D11 Assembly Instructions
PC01 OneShot Assembly Instructions
PC01 OneShot BOM
CH02 Assembly Instructions
D11 Subpanel Graphics
B16 Subpanel Graphics
B16 BOM
B16 Schematic
B16 Assembly Instructions
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