Ok, you’ve got your fuzz, your overdrive, your distortion and your clean boost. That’s all, right? Wrongo. The treble booster is an almost-forgotten member of the distortion family, and without it we wouldn’t have such classic tones as Black Sabbath’s ‘Paranoid,’ pretty much all of Led Zeppelin 1, and everything Brian May’s ever done. So what’s a treble booster and why is it different to just turning up the treble knob on the amp? Well not quite a fuzz, not quite an EQ, treble boosters were typically based on very simple circuits and they promoted the idea of boosting the strength of the signal to the amp while tailoring its tone curve to attain maximum tonal goodness.