QUAD OP AMP FUZZ four stages of gain, infinite-feeling feedback, and harmonic density so thick your notes refuse to decay the fuzz that sounds like a wall falling on you, slowly; PUNISHINGLY HEAVY built for shoegaze, doom, psych, and any player who needs a fuzz that fills a room rather than just sitting in a mix engage it and the whole sonic space changes; SCOOP CONTROL dial between mid-scooped wall-of-sound and flat biting definition with one knob two completely different guitars in one box, from thunderous to surgical; SUSTAIN KNOB gritty low-gain crunch at one end, infinite singing decay that climbs into feedback at the other the harder you dig in, the richer and denser it gets; BASS-EXTENDED DESIGN pushes low end further than typical op-amp fuzzes without losing note definition underneath works equally hard with bass guitar