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

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
Description

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.

Q&A
Have Questions?
The owner archive

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

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.

Comments

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.

RELATED PRODUCTS

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
Ask Before You Buy

Mods & Upgrades

  • Upgrade paths for the guitars you already own
  • Wiring, routing, and hardware swap guidance
  • Advice from people who actually do the mods
Talk Mods

The Vault

  • Discontinued and EOL guitars kept on record
  • Specs, history, and known part compatibility
  • Share your builds and mods with the community
Enter The Vault