DEQX (pronounced Dex)

I first encountered DEQX when Kalman Rubinson and I reviewed the NHT Xd speaker system a few years back, which featured its digital signal processing to implement its crossover and response optimization. The Australian company was putting on an impressive dem of its HDP-3 standalone processor at RMAF, showing the sound of a pair of Gallo Reference speakers driven by Parasound Halo amplification could be first optimized in both time and frequency domains, then its interaction with the room. DEQX's Larry Owens, shown in the photo, enthused about an unanticipated benefit of the speaker correction was the reduction in loudspeaker intermodulation distortion.