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Dunlop positioned the MXR Carbon Copy Deluxe (M292-U) as an expanded iteration of the original Carbon Copy analog delay, adding tap tempo functionality and a Bright mode toggle to the core analog delay circuit. The unit sat above the standard Carbon Copy in MXR's delay lineup, offering greater flexibility for players who required tempo-locked repeats and tonal switching without leaving the analog signal path.
The pedal delivered delay times spanning 40 ms to 1200 ms and accepted tap tempo input with divisions covering dotted eighth, eighth, triplet, and sixteenth notes. An optional modulation section ran from 0.1 Hz to 10 Hz. A Bright switch alternated between the warmer character associated with the original Carbon Copy and a brighter response centred on a 1.5 kHz, +4.5 dB boost with a 200 Hz, −3 dB cut. The circuit employed a 2:1 noise reduction ratio, achieved a noise floor of −96 dBV, and offered a maximum output level of +8 dBV. Input impedance was 1 MΩ and output impedance 1 kΩ. Bypass was true hardwire. The unit ran on a DC 9-volt supply, drawing 22 mA or 44 mA depending on operating state.
Owners sourcing a replacement power supply should confirm the correct polarity and current rating against those figures before connecting. For internal servicing, calibration, or switch replacement, a qualified guitar technician familiar with analog delay circuitry is the appropriate resource.
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