Related Clues:

• Bass player's tool
• Current assertion of private secretary status
• Some concert equipment
• Step (up)
• Decibel increaser, for short
• Unit of electricity, in short
• Hi-fi device
• Band boxes?
• A guitar may be connected to it
• Fuse measure
• "MTV Unplugged" lack
• Piece of gig gear
• Some concert gear
• Roadie's load, in part
• Band's sound booster