Digital Processor Reviews

Editor: DEQX Speaker calibration requires anechoic (no reflection) measurements often made in listening rooms for convenience. But room effects must be removed to allow the speaker's own phase and frequency response to be calculated and adjusted.

The DEQX speaker and measurement microphone is positioned to maximize the time before the microphone picks up the first reflected sound occurring after the speaker's direct sound. DEQX-Cal software then removes the reflected sounds at the operator's discretion.

Since every installation is unique, the process is usually performed by our experienced on-line DEQXpert installers, so no manual is required. Kal used the manual with little or no help from us and we applaud him for the effort. We agree with Kal that the nearly 200-page software installation manual takes some getting used to, but really, in most cases you won't need to look at it. Even if you're as capable and technically minded as Kal, we urge our customers to use free DEQXpert support.

BTW, the PreMate provides two kinds of room calibration and Kal used the ParaEQ described in the manual. Convolution-based room calibration is also available in certain configurations that can be implemented by a DEQXpert installer or dealer.

With regard to JA's comment regarding very low level noise (-110 dB) at around 11kHz, we don't believe its effects are now audible as we've added an additional power supply regulator to reduce it further towards low noise limits.

Thanks again—Kim Ryrie, DEQX