The CS3.7 woofer

Short coil/long gap motor system reduces distortion to one-tenth of conventional woofers

The woofer also utilizes an innovative diaphragm that is basically flat and therefore reduces the diffraction of the midrange energy usually caused by the woofer’s conical cavity. The massive magnet powers a very high output and low distortion long magnetic gap and distortion is further reduced by the use of a heavy copper pole ring and a copper pole sleeve that reduces inductance nonlinearity. The large 3" diameter voice coil allows high power handling.

The very low frequencies are augmented by a passive bass radiator diaphragm which avoids the resonance and noise problems of a ported enclosure.

Go HERE to see the "anatomy"
of the CS3.7 woofer

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