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At A Glance
- Input Impedance
- >450 kΩ
- Output Impedance
- Noise Floor - Gate Off
- -70 dBV
- Noise Floor - Gate On
- -85 dBV
- Frequency Response - Gate Open
- 0 dB, 20 Hz to 20 kHz
- Frequency Response - Gate Closed
- -20 dB at 500 Hz / -25 dB at 20 kHz
- Low Tone Control
- ±9 dB at 100 Hz
- Mid Tone Control
- ±16 dB at 200 Hz to 5 kHz
- High Tone Control
- ±12 dB shelf at 1.5 kHz
- Bypass
- True Hardwire
- Current Draw
- 18 mA Power
- Requirement
- 9 volts DC
Dunlop positioned the MXR Fullbore Metal (M116-U) as a dedicated high-gain distortion pedal within the MXR effects line, designed around the demands of heavy and metal playing styles.
The unit provided high-gain distortion alongside a three-band EQ section with separate bass, mid and treble controls. A midrange sweep control allowed the centre frequency of the mid band to be dialled across a range from 200 Hz to 5 kHz, with up to ±16 dB of cut or boost available at that swept point. A Scoop switch offered a fixed mid-cut voicing as an alternative to the swept mid. A switchable noise gate with an internal sensitivity trim was also built in; with the gate engaged, the noise floor measured -85 dBV against -70 dBV with it off. The pedal operated on 9 volts DC, drew 18 mA, and used true hardwire bypass switching.
Owners sourcing a replacement power supply should confirm the 9 V DC, centre-negative standard before purchasing. For questions about internal trim adjustment, pedal-board integration or any fault diagnosis, a qualified guitar technician will be best placed to help.
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.
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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
