Dunlop M135-DUNLOP-U MXR Smart Gate Noise Gate Pedal

Name: Dunlop M135-DUNLOP-U MXR Smart Gate Noise Gate Pedal
Brand: Dunlop
SKU: M135-DUNLOP-U

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Dunlop M135-DUNLOP-U MXR Smart Gate Noise Gate Pedal

Product images are provided for reference and may not represent the exact model, configuration, or included components.

At A Glance

Input Impedance: 1 MΩ
Output Impedance: 1 kΩ
Maximum Input Level: +7dBV
Maximum Output Level: +7dBV
Noise Floor - Gate Closed: -105 dBV
Noise Floor - Gate Open: HISS: -100 dBV / MID : -100 dBV / FULL: -96 dBV
Frequency Response - Gate Open: +0/-1 dB, 20 Hz to 20 kHz
Frequency Response - Gate Closed - Hiss: -3 dB at 1 kHz / -22 dB at 20 kHz
Frequency Response - Gate Closed - Mid: -3 dB at 500 Hz / -23 dB at 20 kHz
Frequency Response - Gate Closed - Full: -36 dB at 60 Hz / -22 dB at 500 Hz / -23 dB at 20 kHz
Bypass: Hardwire
Current Draw: 15 mA
Power Supply: 9 volts DC

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Description

Dunlop positioned the MXR Smart Gate (M135) as a noise gate pedal within the MXR effects line. Its defining feature was a three-mode noise reduction system offering selectable gate characters — Hiss, Mid, and Full — intended to address different noise profiles while preserving playing dynamics during open-gate conditions.

The pedal operates on a 9-volt DC supply and draws 15 mA. It accepts signals up to +7 dBV at an input impedance of 1 MΩ and delivers output at 1 kΩ impedance with the same +7 dBV ceiling. The gate's closed-state noise floor reaches −105 dBV, while open-gate noise floors measure −100 dBV in the Hiss and Mid modes and −96 dBV in Full mode. Frequency response when open holds within +0/−1 dB across 20 Hz to 20 kHz. In closed mode, the three filter characters behave distinctly: Hiss attenuates −3 dB at 1 kHz and −22 dB at 20 kHz; Mid attenuates −3 dB at 500 Hz and −23 dB at 20 kHz; Full attenuates −36 dB at 60 Hz, −22 dB at 500 Hz, and −23 dB at 20 kHz. Bypass is hardwire.

Owners setting up or troubleshooting the M135 — particularly around threshold calibration, signal chain placement, or power supply compatibility — should consult a qualified guitar technician or electronics repair professional familiar with effects signal chains.

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