Related Clues:

• Sound investment for a band
• One for the roadie
• Increase, with "up"
• Mike gets juice here?
• Intensify, with 'up'
• Rock band need
• Concert stage item
• It pumps up the volume
• Added power, in slang
• Starter
• Bisque, for one
• Performance piece?
• Arena rock need
• Introductory course
• Nuts' opposite?