Used Studio Projects C1 - Cardioid Condenser Microphone for Sale!
This is a seriously beautiful microphone, and it sounds great as well! It is sturdy and has a large capsule for capturing all sorts of different sounds.
Lightly used, good condition. This microphone was well taken care of. It was tested and is fully functioning. Comes in a carrying case. Missing shock mount and foam filter. Only microphone and case included.
The original Studio Projects C1 microphone is a transformerless FET condenser with a large-diaphragm K67-style capsule and switchable pad and filter. The mic was revised in 2006; the newer version shows the Studio Projects logo, but no cobranding from 797 Audio.
The capsule is a 34mm O.D. K67 derivative. The rear backplate is not brass, but perforated plastic. The rear diaphragm is clear Mylar.
A single 3-way switch on the rear of the microphone body enables either a high-pass filter or -10dB pad. The middle position of the switch disables both features. (To be clear, it is not possible to engage both the pad and filter simultaneously.)
The circuit powers the capsule’s backplate with 43.5VDC. This value does not change when the pad is engaged; the pad is created by switching a 150pF ceramic capacitor into the high-impedance circuit.
The entire circuit is implemented on a single PCB.
The JFET is a 2N5457. The presence of the trimmer on the circuit board suggests that the JFET was biased after installation.
The original C1 was commonly compared to the Neumann U87 despite the fact that the circuits of these two microphones are very different from each other.