a chamber containing a set of pipes in a pipe organ or of reeds in a reed organ, and having movable slats or shutters that can be opened or closed to increase or diminish tonal volume.
[ 1795-1805 ]
SWELL BOX
Meaning of SWELL BOX in English
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012