Chapter 1. Welcome to DEQX
1.2 HOW DEQX® CALIBRATION WORKS
Compared to every other component in the audio recording, production, media and
playback chain, the mechanical nature of speakers makes them extraordinarily prone to
errors and distortion that detract from realism. These include timing or phase errors
where numerous “groups” of frequencies lag behind others to varying degrees;
amplitude (volume) errors that result in inaccurate tonal characteristics; and frequency-
dependent distortion many times higher than the signal from the electronics.
The advanced algorithms in DEQX software analyze the behavior of the speaker based
on anechoic measurements, creating detailed corrections that calibrate the transducers
(“drivers”) and correct for these errors. Each speaker or driver can be calibrated
individually for the utmost in reproduction accuracy. These detailed corrections are
then assembled into a configuration of filters that is uploaded to the DEQX, and which
it uses to process the audio signal that you ultimately hear as music in your listening
room. This measure-calibrate-configure cycle is the core of optimizing your speakers
using DEQX.
1.3 HOW TO USE THIS MANUAL
Chapters 2 through 4 guide you through the initial hardware setup and describe the
front panel and the DEQX Remote. You will need to come back to these chapters to re-
read the more in-depth sections, such as the three-band Preference EQ.
Chapter 5 walks you through the initial setup of DEQX-Cal. We strongly recommend
that you carefully follow this chapter. Chapters 6 to 9 will guide you through your first
measure-calibrate-configure cycle. These chapters are both tutorial and reference.
Chapters 10 to 12 deal with room-related issues: room measurement, subwoofer
integration, and room EQ. Chapters 13 and 14 are for speaker designers and advanced
enthusiasts implementing active speakers with DEQX. The remaining chapters and the
appendixes provide detailed reference information.
1.4 DEQXPERT CONSULTATION
Your purchase of a new PreMATE, PreMATE+, HDP-4 or HDP-5 includes an initial
DEQXpert™ consultation. (It is an optional upgrade for the HDP-Express II.) This
consultation gets you started with your initial setup. We will walk you through the steps
to set up your speakers and microphone, and control your computer remotely (with
your permission) to perform your first measure-calibrate-configure cycle.
After your initial consultation, you will have a set of profiles configured that you can
switch between with the DEQX remote. You can use the guidance in this manual to
continue to refine your configuration, or purchase additional DEQXpert™ consultation
to have us do it for you. For more information, see http://deqx.com/deqxpert.php.
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