Related Clues:

• Signal booster
• Device to boost sound levels
• Device augmenting sound
• Uses it to clearly broadcast a British politician gets life over mid-air racism initially
• Sounds all up with this second-rate politician and long-time lag, I admit
• What Speaker may require one's found in a politician and long-term inmate
• It intensifies spread of fire from lamp I overturned
• Signal increaser
• Device that strengthens mint imperial, strong to eat
• Device used to increase sound
• A PA will require some gain from this
• Electronic equipment to increase signal strength
• Intercom component
• Pair filmed briefly moving part of roadie’s kit?
• Device increasing loudness