Related Clues:
- iPod part
- Box for a rock band
- Intensify, with "up"
- Music festival box
- Electricity measure
- Sound-boosting equipment
- It helps the neighbors hear me jam
- Buy this if you're getting an electric guitar
- Angled accessibility aid
- Guitar riff maximizer
- P.A. system component
- Rock concert box
- Rock box
- Resistance with some current inclination
- Music box, maybe