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
• Fires (up)
• Units of electric current
• Concert hall equipment
• Gig needs
• Boosts, with 'up'
• Roadies' responsibilities