Subwoofer Equalizer

Subwoofer Equaliser

(Using The Linkwitz Transform Circuit) Rod Elliott (ESP)

The Linkwitz transform circuit is a hugely flexible way to equalise the bottom end of a sealed loudspeaker enclosure. Unlike the original "EAS" (Electronically Assisted Subwoofer) project or the ELF™ systems, a speaker that is corrected using this method is flat from below resonance to the upper limit of the selected driver. The low frequency rolloff point is determined by the parameters of the transform circuit. Should the enclosure size be too small and cause a lump in the response before rolloff, this is also corrected. A conventional active crossover network is then used to divide the subwoofer signal from the main channel signals.

For a detailed look at how the circuit works, please click here to see the article that describes the operation of the circuit.

For Full Circuit Please see http://sound.westhost.com/project71.htm