Related Clues:

• Bassist's need
• Increase the intensity, with 'up'
• Guitarist's accessory, for short
• Load for a roadie
• Electric guitar need
• Rock band's need, for short
• Booster on stage
• Rock concert fixture
• Fender attachment
• Piece of Woodstock gear
• Volume booster
• Stereo system component, for short
• Rocker's equipment
• Rock band's enhancer
• What a guitar may be hooked up to