Coleman Audio CA500EQ

The Coleman Audio CA500EQ is a four-band Stereo EQ inspired by the EQ section of the MCI JH500 series console.
The Coleman Audio CA500EQ uses stepped level and frequency controls allowing for easy recall and precise settings. Low and high bands provide up to 10dB of cut or boost in 2dB steps while both mid again in 2dB steps. A 18dB/oct high-pass filter with variable frequency between 30 to 300Hz, is also available and can be engaged separately from the EQ. Each channel boasts input and output level controls
Designed by Glenn Coleman and commissioned by legendary producer and engineer Jimmy Douglas, the CA500EQ circuits are designed to musical scales and not mathematical relationships and the variable Q circuits keep the tonal balance when increasing or decreasing the gain. A stereo/mono switch transforms the CA500EQ into a mono EQ with the signal first reaching the left channel before reaching a loop point sending the signal to the right for further processing.
Coleman Audio CA500EQ Main Features:

4 band stereo equalizer with stepped switches
Inspired by the MCI JH500 console EQ
Balanced XLR Input and output
Input and Output level controls
Bypass and phase reverse switches for each channel.
stereo/mono switch transforms the CA500 into mono EQ unit.
HF: 8kHz, 10kHz, 12kHz and 16kHz (shelf or peak) with 10db of boost or cut in 2db discrete steps.
LF: 30Hz, 60Hz, 100Hz, and 150Hz (shelf) with 10db of boost or cut in 2db discrete steps.
MF he two mid bands are peak equalizers with frequencies overlapping by 1/4 octave and have up to 14db of boost or cut in 2db discrete steps.
18dB/oct HPF with variable 30Hz to 300Hz.
Independent HP filter switch on/off control
Circuits designed to musical scales and the
Variable “Q” circuits maintain tonal balance