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Dunlop positioned the MXR Carbon Copy (M169-U) as an analog delay pedal in the MXR effects line, built around bucket-brigade delay technology. It offered delay times from 20 ms up to 600 ms alongside a modulation circuit, placing it in the warm, lo-fi analog delay category rather than the pristine digital segment.
The Carbon Copy operated on 9 volts DC and drew 26 mA, making it compatible with standard pedalboard power supplies of that voltage and current capacity. Input impedance measured 1 MΩ and output impedance 1 kΩ, which are relevant figures when planning signal chain placement. Maximum input level was +5 dBV at 500 Hz and maximum output level +8 dBV. The noise floor measured -96 dBV with mix at maximum clockwise and -104 dBV with mix at maximum counter-clockwise. Delay distortion was specified at less than 1% at 1 kHz with a -5 dBV input. The onboard modulation section swept from 0.2 Hz to 2.2 Hz. A 2:1 noise reduction ratio was applied to the delay signal. Bypass was implemented as true hardwire, leaving the signal path unprocessed when the effect was disengaged.
Owners requiring service, calibration, or pedalboard integration advice should consult a qualified guitar technician or electronics repair specialist familiar with analog effects units.
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Dunlop
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