Woofer
A woofer was a type of loudspeaker used for automobiles which allowed one to listen to the radio at much higher volumes.

In 2374, Tom Paris had a Chevrolet Camaro that was equipped with such a device. He often drove the car down Highway 1 on his holodeck program Paris Program Alpha-1, or as he called it, "Grease Monkey." ()

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Communications technology