baffle

a deflector plate in a loudspeaker used to eliminate the out-of-phase sound waves from the rear of the loudspeaker

Banana plug

A single-wire electrical connector used for joining wires to equipment

Bandpass

A device that passes frequencies within a certain range, rejecting any frequency outside of that range

bass reflex cabinet

A speaker enclosure that uses the sound from the rear side of the diaphragm to increase the efficiency of the system at low frequencies

Bi-amp

Using two amplifier channels to power a loudspeaker with multiple drivers

bi-wire

A single cable with two conductors connects an amplifier to a loudspeaker

Binding post

A connector used to attach a single wire

Bipole

Surround speakers that have two or more speakers that output sound from both sides of the cabinet

Bookshelf speaker

A compact loudspeaker intended to be placed on a raised surface