Demodulation Rings

Many Celestion LF loudspeakers feature demodulation rings to substantially reduce inductive rise as well as harmonic and intermodulation distortion

April 22, 2014

http://celestion.com/product/150/cf1025c/
Increasing the number of turns on a driver's voice coil can help to increase overall output SPL. However as a consequence, impedance rises more quickly as frequency gets higher which has the opposite effect of reducing SPL. Demodulation rings can
reverse this decrease by conducting away unwanted electric current, thereby reducing inductance, Le - and hence impedance - within the motor circuit.

Demodulation rings also substantially reduce the harmonic and intermodulation distortion associated with voice coil displacement.

Products such as the CF1025C mid/bass loudspeaker feature demodulation rings.
Back to PA Tech