FrAG Boost – Glow in the Dark Edition

2026-10 : Limited Glow in the dark edition. Exactly the same circuit as the original FRAG.

The FrAG Boost is one of our most brutal and flexible boost/preamp pedals to date. Built for players who want more aggression, more precision, and more attitude — it’s designed to push the front end of your amp into sharp, cutting high-gain territory while keeping your tone tight and articulate. Use it as a preamp boost to any high gain pedals or amps to kick your tones.

Drive adds a bit of crunch and grit, will get you from completely grind to overdriven territory. Bright knob will bring presence and slice through the muddy low-end. 8-Mode selector will help you dictate the low-end cut with 8 different modes. Volume is a classic 0 to full-on boost to slam your amp front end.

Result is rich harmonic, no more flubby low-end, super sharp and crisp metal tones.

It’s the perfect partner for any amp that needs a little more bite, or a pedalboard that needs a clean, solid signal driver.

Like all GUPTech gear, it’s hand-built in Saguenay, Quebec, using quality components and a no-nonsense layout meant to live on the road.

Tech Specs

We made this one because sometimes you just want your amp to sound like it’s furious—without adding fizz or losing the low-end punch. The FrAG Boost gives you that presence and depth, like stacking two great boosts in one box.