A treble booster is an effects pedal used by guitarists to boost volume and especially the high end of their tonal spectrum, and was popular mostly during the 1960s. Popularized by guitarists such as Tony Iommi, Ritchie Blackmore, Rory Gallagher, Brian May, Marc Bolan and Andy Scott, treble boosters were used to overdrive amplifiers (mostly dark sounding, British tube models such as Marshall Bluesbreakers and Vox AC30s) in order to create a more distorted yet focused sound. They came up in the mid-1960s. By the 1980s they had become obsolete. Guitarists used overdrive pedals instead, in a similar fashion.
I'm Joost Nusselder, the founder of Neaera and a content marketer, dad, and love trying out new equipment with guitar at the heart of my passion, and together with my team, I've been creating in-depth blog articles since 2020 to help loyal readers with recording and guitar tips.