Related Clues:
- Charges (up)
- Guitar boosters
- Concert's sound boosters
- Some were for The Byrds
- Concert blocks
- Gear for gigs
- Rock tour gear
- They're on stage before the band
- They were seen at Woodstock
- Units of electric current
- Concert hall equipment
- Gig needs
- Boosts, with 'up'
- Roadies' responsibilities
- Some stand at the side of the stage