Coming from an IT background to an AM transmitter site might leave you with a world of questions. Mark Persons explains the ...

The PIONEER TS-A652F A Series is a 3-way coaxial speaker with a maximum output of 320w and a nominal output of 70w. It features a 11mm blanched dome, ... Three-ohm speakers; 250w; ...

Ohm is the unit of electrical resistance. Just kidding. Well, it is, but this is how it's of most relevance to amplifying sound. Speakers have at least one, and usually several, drivers.