Studio Projects C3 Circuit Upgrade Kit

This circuit mod kit will give your Studio Projects C3 the same frequency response curve as a $3300 Neumann U87 -- although with fuller bass! Better still, the high-frequency response of the circuit is adjustable, so you can dial in as much filtering/attenuation as you like. Linear Circuit, No More The Studio Projects C3 is nicely built, but in our opinion is too brightly voiced for many sources. It's great for sources that need to cut through a dense mix, but can be fatiguing, especially when layered. We have created an add-on EQ circuit that reproduces the corrective high-frequency attenuation built into the Neumann U87. It gives the C3 a sound very very close to that of a U87, although with fuller low-frequency response. The kit includes additional upgrades as well, to reduce microphonics, lower the mic's self-noise, and increase sensitivity. Here is a frequency sweep showing the response of the C1 circuit (which is substantially the same as the C3's). This is not an acoustic test o