Related Clues:
- Volume boosters
- Races, in a way
- ___ up (accelerates)
- Stadium show equipment
- Bandstand volume boosters
- Equipment for blasting rock?
- Boxes for bassists
- Gear for guitarists
- Gear connected to loudspeakers
- Volume-boosting devices
- Measures introduced by Hampshire
- Current measures introduced as money problems snowball
- Some sound equipment on stage
- Rockers' devices
- Goes "vroom"