Very easy to used, three knobs, it's all you need to have a lots of good sound.
I play the opamp through a rivera knucklehead and a koch powertone, and it sounds greath with both amp, and my this pedal is very responsive and works great with all guitars (Humbuckers, single coil, p90).
I love it, you can get the smashing pumkpins sound easily, with the higher gain setting, you can have big fuzz tone, and even with the lower setting, the pedal sounds awesome, you can play everything with this stompbox; lead, chords, it's impossible to have a bad sound !
Perfect for rock sound (grunge...)
The OpAmp is great, i've own many fuzz pedal and this one is a keeper.
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Ronmo's review (This content has been automatically translated from French)
Configuration is very simple, 3 knobs (volume, tone, gain).
It very easy to get the desired sound (the race of the buttons is very progressive and provides a beautiful pallet)
The sound quality is impressive, this pedal is based on a big muff (opamp version, v4 big muff), was the model used by the Smashing Pumpkins on Siamese Dream.
There is no mistake, we can easily get the sound of smashing with the unit whose area of expertise is the big rhythmic saturated (from rock to metal), even though she knows as illustrated in plans with little gain (type solo riff quiet)
The pedal responds very well to the types of pickups, humbuckers, single coils, p 90.
The "big muff" big sound ideal for rock to metal.
I tried a lot of fuzz in many brands, it is one of the best of ... (plus it's cheap when you buy on the website of the brand).
It is a very good fuzz in mind that takes a little fuzz on the distortion, the ultimate weapon in rhythm (grunge, Queens Of The Stone Age, em croocked vultures ... etc.)