Related Clues:
- Item of concern in a sound check
- Sound booster at a concert
- Rock booster
- Arena blaster
- Roadie's armful
- It's for the Byrds?
- Measure of electric current
- Band buy
- It pumps up the volume, for short
- Band piece
- Expressway entrance
- Rock-band gear
- Fender product
- Bassist's need
- Increase the intensity, with 'up'