Related Clues:

• Rock band need
• Concert stage item
• It pumps up the volume
• Hold (up)
• Performance piece?
• Arena rock need
• Make loud
• Gig component
• Flight section
• Cane, to Charlie Chaplin
• 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
• ___ 8 [grumble]