The SB21RDCN-C000-4 is a newly designed compact tweeter from SB Acoustics featuring a 21mm ring radiator diaphragm and neodymium magnet system. It has an excellent frequency response to above audibility. The centre of the diaphragm is inverted and bonded to an internal dimple on the pole piece, this innovation negates the need for a front phase plug.
Inverted centre phase plug free design
Non-resonant diaphragm design for minimum high frequency break-up
Copper capped pole for reduced voice coil inductance and minimum phase shift
Compact low distortion neodymium motor system
Non-resonant rear chamber with optimised damping for improved dynamics