Related Clues:

• Concert stage item
• It pumps up the volume
• Performance piece?
• Arena rock need
• Make loud
• Gig component
• One could go up to 11 in 'This Is Spinal Tap'
• 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