Phase
correction is a unique feature of DEQX Calibrated™ processing,
setting it apart from normal equalizers. Audiophile speaker
manufacturers go to great expense to match drivers in a pair
of matched loudspeakers to ensue the best possible 3D imaging.
The
immediate effects of phase correction are often that a
nasal character of the sound is removed and spatial realism,
particularly depth, is improved.
It is critically important
for all frequencies from each speaker to be in phase with
each other as they arrive at the listener. It is only the
phase linearity between two speakers that can provide us
with the three-dimensional being there experience, just
as we need two eyes to see three-dimensional depth.
Unlike
room correction alone, which can only measure and correct
phase errors in the lower three or four octaves, DEQX Calibrated™
processing, by also measuring the anechoic (native) impulse
response of each speaker, is able to correct its phase
and amplitude (frequency response) through the lower mid-range
to high frequencies as well.
Phase accuracy is required
between individual drivers in a speaker (woofer/tweeter
for example) as well as between the other speaker/s in a
system (left/right for example).
DEQX uses special measuring
techniques to achieve the anechoic measurements because
measurements taken from the listening position in a room
also contain room reflections, which are only of interest
when performing room correction alone.
DEQX's Digital Signal
Processing uses proprietary, patent pending, very low latency
inverse convolution (FIR or Finite Impulse Response) filters,
that can correct phase errors at hundreds of frequencies
simultaneously at high resolution, and without introducing
any unwanted side effects. |
