Big Muff Voigt-Kampff mods

This model had been retired, but do to popular demand, I am offering it in limited quantities with a roughly 4 week turnaround time.

The Voigt- Kampff mods turn old Big Muffs into 2 channel gain monsters. All mods are done to old used Big Muff Pi pedals and you end up with a Stock (Black Russian Specs) channel and a Mod channel.

The Mod channel incorporates the following mods:

1. A James/Baxandall tone stack replaces stock tone control. The modified mode has Bass and Treble controls. This gives a lot of added eq control, brings back some mids, and gives a tighter sound overall.

2. A Jfet boost stage is added after the new tonestack and before the final BMP gain stage. This gives extra volume on tap and more clarity when using the modified mode. A Gain knob controls the output of this stage

3. Acid etched label  and logo plates for all controls


The other part of this mod set is the meter. We use vintage Weston, Simpson, Westinghouse, Triplett, etc. meters and our custom designed circuit let's your guitar playing dynamics drive the meter and the intensity of an bicolor LED, which changes with playing dynamics as well. 

Each unit is unique. I use quality vintage meters and high quality knobs, but they are mainly NOS or repurposed meters and knobs, so they vary. They may not be the same as the ones in the pics, but they will be cool for sure.

A DeMont premium smooth-click footswitch replaces the original switch.

All mods are accessed through a Taiway compact footswitch (LED changes from Yellow- stock, to Blue when mods are engaged).

Various video samples available on Wrought Iron Effects Instagram and Facebook.


Built to order. Turn around is about 5-6 weeks, currently.