A booster is an effects pedal used by guitarists to increase the overall level or volume of their signal, often to enhance certain aspects of their tone or to push an amplifier into overdrive.

By amplifying the guitar’s signal, a booster can make solos stand out more prominently in a mix, or drive an amp harder for a more aggressive sound.

Boosters come in various forms, including clean boosters, which simply raise the volume without altering the tone, and overdrive or distortion boosters, which add some level of grit and warmth.

Some booster pedals also feature tone controls to adjust the EQ, allowing players to shape the frequency response and fine-tune their sound.

They are a versatile tool for achieving greater dynamic range and tonal flexibility in both live performances and studio recordings.