The Repeater part of the Mk IV is identical the Reuss 'stand-alone' Repeater pedal, which means it features an added the MIX control (clean blend), which was not part of the vintage Vox Repeat Percussion effect. The mix control makes it a more useful and less extreme tremolo effect, because the amplitude of the spikes can be watered out by mixing the effect with the clean sound. Still, you can have the pure, undiluted full-on psychedelic stutter when you need it (MIX control all the way down).
The fuzz part also features a level control, which eliminates the need for the master boost circuit of the Mk III. The vintage treble/bass booster circuit is integrated into the fuzz part of the pedal, which features a three-way mode switch to select between fuzz/fuzz+tone booster/tone booster modes.
In all, this makes for a simple and intuitive pedal to use, with all the effects of the discountinued Reuss Repeater Fuzz Mk III - plus the added feature of the MIX control for the Repeater.
The sound shaping circuits at the core of the pedal remains completely true to the vintage original circuits of the 1960s Vox guitars, and we continue to use the correct old 'tin can' transistors.
Adding the twin level controls (including extra output gain stages and output buffers), plus clean blend to the Repeater and the mode selector to the fuzz, adds a whole lot of additional parts to the pedal, which makes it a very different deal, compared to the bare-bones approach of the Mk III. More modern and convenient and less quirky.
Because of the much increased number of parts in the Mk IV, we had to skip the send/return jacks for wah pedal, which was a feature of the Mk III.
There are 86 enclosures painted and silk screen printed for the first batch.
The website will be updated with a demo video as soon as possible.