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Dunlop positioned the M76-MXR-U Studio Compressor within the MXR effects line as a compressor pedal built around Constant Headroom Technology, targeting players who required recording-quality compression in a true bypass format.
The unit offered four selectable compression ratios — 4:1, 8:1, 12:1, and 20:1 — with an attack range of 20 µs to 800 µs and a release range of 50 ms to 1.1 s, allowing precise dynamic control across a wide range of source signals. Input impedance was rated at 1 MΩ and output impedance at 600 Ω, with a frequency response of ±1 dB from 20 Hz to 20 kHz. The noise floor sat at -90 dBV and THD was specified at less than 0.5%, consistent with the unit's studio-oriented design brief. Maximum gain was 31 dB. Bypass was implemented as true hardwire switching. The pedal ran on a 9-volt DC supply, drawing 14 mA with LEDs off and 19 mA with LEDs on.
Owners seeking setup guidance, internal adjustments, or compatible power supply options should consult a qualified guitar technician or electronics repair professional familiar with effects pedal servicing.
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