Related Clues:

• Concert aid
• Solid-state, e.g.
• Connection for an electric guitar
• Unit of elec. current
• Booster of a rock band
• Rock band's item
• Audiophile's gizmo
• Sound intensifier
• Increase, with ''up''
• A little juice?
• Speaker's adjunct
• Signal strengthener
• One coulomb per sec
• You can rock with one
• Energy drink brand