High-power woofer for balanced sound, deep bass and high efficiency, with cellulose diaphragm, concave-shaped dome and capton bobbin for good power handling.

The new 175 mm woofer provides an additional ferrite ring for improved efficiency.

TT 145:
CC 51, FS 57

TT 130:
BS 52

TT 175:
BS 53, WS 55, FS 58

TT 270:
SUB 50 ESP