CM87se

Description

Advanced Audio CM87se

The CM87SE came about because a fellow engineer asked us if he could use the CM87 (discontinued) in close on drums in a “Glynn Johns” type set-up where the microphones are less than 2’ from the closest drum or cymbal source. To accomplish this we fit a more complex output transformer with dual windings and bi-metal lamination’s that is able to handle more easily the fast rising drum transients when placed close to the drums.

The CM87SE in all other aspects is identical to the CM87 (discontinued). It is a large diaphragm fet three pattern condenser microphone that features our double-diaphragm/double back-plate 6-micron AK67 type capsule and Class “A” transformer coupled amplifier design. It is well suited for recording vocals or instruments in any studio or live application and able to capture the drums at very close distances.

The CM87SE is built to a very high standard and offers a remarkably full yet well-defined and ultra-clean sound. We fit the more sophisticated output transformer here in our shop,  and the CM87SE goes through a more rigorous level of QC.

The CM87SE can be configured as either omni, cardioid, or figure-eight via a front mounted metal toggle switch.

The CM87SE has 14db more headroom than traditional fet/transformer circuits.

Specifications:

35mm capsule with dual 6-micron center-fed diaphragms

Class A fet/discrete transformer-coupled circuit

dual bobbin transformer with bi-metal laminations and 2.25:1 ratio

3 patterns selected via a  front toggle switch (omni, cardiod & Fig-8)

100Hz roll-off, switched from the body

-10dB pad, switched from the body

Maximum output +19dbu

Frequency response: 25Hz to 20kHz

Noise: <12dB (A-weighted)

Distortion: 0.5% @ 128dB, and 0.5% at 138dB with -10dB pad engaged

Impedance: <200 ohms (load impedance < 1.2K)

48V requirement

Robust shock mount

Aluminum road case