He went in with two guitars, a wireless mike, and a very basic amplification system.

However, to get the sounds into the water required a powerful speaker and amplification system that only the Navy was likely to have.

And the six rats chewed through the wires on their amplification system.

The amplification system at the park is better than average for outdoor music.

But then opera houses aren't supposed to need amplification systems.

These talking points are then fed to sometimes unquestioning media, which become a kind of amplification system.

The solution to reach middle range stroke is to use an amplification system.

If amplification systems improve an orchestra's sound in a particular hall, "then I don't have a problem with it," he said.

This series of three bones acts as an amplification system to allow enhanced hearing.

On Tuesday, the hall's amplification system was rarely true to sound.