Related Clues:

• Bass player's tool
• Step (up)
• Decibel increaser, for short
• Unit of electricity, in short
• Hi-fi device
• A guitar may be connected to it
• Fuse measure
• "MTV Unplugged" lack
• Piece of gig gear
• Band's sound booster
• Energize, with "up"
• Piece of stage equipment
• Band's booster
• Rock concert implement
• Rock tool?