bass reflex baffle

bass reflex baffle

[¦bas ′rē‚fleks ‚baf·əl]
(engineering acoustics)
A loudspeaker baffle having an opening of such size that bass frequencies from the rear of the loudspeaker emerge to reinforce those radiated directly forward.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.