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At A Glance
- Input Impedance
- 500 kΩ
- Output Impedance
- 3 kΩ
- Maximum Intput Level
- +5 dB
- Maximum Output Level
- +8 dB
- Noise Floor
- 95 dBV
- Phase Shift Range
- 180 Degrees
- Bypass
- Hardwire
- Current Draw
- 6 mA
- Power Supply
- 9 volts DC
Dunlop positioned the MXR Phase 100 (M107-U) as a feature-rich phaser pedal within the MXR effects line, offering greater tonal flexibility than a single-knob phaser design. The unit was built around a hardwire bypass circuit and a 9-volt DC power supply.
The Phase 100 carried two primary controls: a Speed knob and an Intensity control with four selectable waveforms, giving the player a broad range of phasing textures from slow, subtle sweeps to more pronounced modulation. The pedal operated with an input impedance of 500 kΩ and an output impedance of 3 kΩ, with a maximum input level of +5 dB, a maximum output level of +8 dB, a noise floor of 95 dBV, and a phase shift range of 180 degrees. Current draw was rated at 6 mA.
Owners seeking period-correct replacements for internal components, knobs, or power supply connections should consult a qualified guitar technician or electronics repair specialist familiar with vintage effects circuitry.
STRAIGHT TALK
What Stands Out
Keep In Mind
From the people who own them
Nothing in The Vault is for sale. These records exist so the instruments stay documented after the manufacturer moves on — and the most useful part of that record is what owners add to it.
Owner photos
Put yours on the record.
The catalog shot showed one finish, under one light, a long time ago. Yours has been played. Photos from owners are what the next person finds when they are trying to identify a part, match a finish, or work out whether the one they just bought is really what the seller said it was.
What do you know about this one?
Specs only go so far. What actually fits, what breaks first, what the factory got right and what everyone ends up changing — that lives with the people who own them, not in a datasheet. Post what you know and it stays on this page for whoever comes looking next.
Build Your Complete System
Manufacturer-verified compatible cameras, recorders, mounts, accessories, and licenses for this product. Adjust quantities and add the entire bundle to your cart in one click.
Looking for more Dunlop products? Shop the full Dunlop catalog →
Gear Help, Handled
From spec questions to full builds — players who have lived this gear since 2007.
Since 2007
Fit & Compatibility
- Bridge, tuner, and nut fit confirmed for your guitar
- Pickup and electronics compatibility checks
- Pedal power and amp/cab impedance matching
Mods & Upgrades
- Upgrade paths for the guitars you already own
- Wiring, routing, and hardware swap guidance
- Advice from people who actually do the mods
The Vault
- Discontinued and EOL guitars kept on record
- Specs, history, and known part compatibility
- Share your builds and mods with the community
