Related Clues:

• Concert boosters
• Bits of current
• Measures of electrical current
• Roadies carry them
• Metal band's equipment
• Music-store offerings
• PA system components
• Guitar blasters
• Concert-stage lineup
• They're schlepped on tours
• Elec. units
• Hi-fi components
• Intensifies, with ''up''
• Guitar store items
• Concert stack