Related Clues:
- Roadie's vanload
- A rather quiet sound is increased by this
- Bandstand box
- Coachella blasters
- Boxes delivered to Boston or Chicago?
- Equipment hauled by a roadie
- Electric guitar accessory
- Device making sound louder
- Tour bus equipment
- Guitar music blaster
- Bit of concert gear
- Electric guitars plug into them
- Box at a concert
- Tour bus gear
- Sound-boosting boxes, for short