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DEQX Express II

14.00 KGS

Product Description

Master the art of timing 
DEQX processors correct the distortion that all speakers make—electro-mechanical devices that they are—and offer room compensation as an added extra. While righting frequency-response errors as other units do, they also uniquely fix critical timing errors by adjusting thousands of frequency groups so that they arrive on time.

Other ‘room correction devices’ simply adjust amplitude response (uneven output at different frequencies) to offset room modes. But they can’t address the fine details of phase coherence; the group-delay timing issues that manifest in all real-world speakers.

The results are startling; two-channel and surround systems open up in a dramatic way when timing, phase and amplitude accuracy are restored to the speakers, with judicious room compensation added.

DEQX HDP-Express II™ 
The Express II packs much of the new technology of our flagship HDP-4 Preamp Processor in a new, extraordinarily cost-effective design. The Express II uses professional-grade components and power supplies but we’ve kept the price of the Express II down by moving the front-panel controls to the remote while deleting the HDP-4’s balanced analog and digital outputs for a simpler chassis.

Like its predecessor, the Express II provides DEQX Inline™ correction for your existing speakers, room and media. Plus, it does the impossible and precisely integrates one or a pair of subwoofers.

The Express II also supports 2- or 3-way active speakers for those opting for DEQX XO™ Active configurations with DEQX’s linear-phase crossovers, now or in the future.

The Express II offers four hi-resolution digital inputs, accepting sample-rates including 24-bit/192k and two analog inputs (balanced XLR and single ended RCA) with 96k analog-to-digital conversion.

Measure (and correct) speakers first, then the room 
In correcting the speakers—before the room—our comprehensive DEQX-Cal™ software generates correction filters for phase, timing coherence and frequency-response. Only then does DEQX-Cal measure from the listening area for room correction.

DEQX technology is unique 
It corrects speaker frequency-response and timing errors by adjusting thousands of frequency groups, depending on your speakers’ measure­ments, so that they arrive at the correct time.

Traditional analog and digital EQ corrupts the timing coherence around the frequencies that they’re trying to equalize for volume. DEQX Processors slow down on-time and early-arriving frequencies so that slower frequencies can catch up.

That just can’t be done in the analog domain!

DEQX uses real computing horsepower to make that happen with a 240-megaflop, 32bit floating-point Digital Signal Processing Engine that essentially achieves zero distortion.

A DEQXpert agent can run the comprehensive DEQX Cal™ software for you on a secure, remote connection for a surprisingly affordable price. You’ll need a simple USB link to your PC (Windows compatible computer) using a measurement microphone and a broadband connection.


For more in-depth product info and discriptions please visit the DEQX website http://www.deqx.com/product-hdpExII-overview.php


How to install

Download PDF


Tech Specs


Two analog inputs: Unbalanced (2 x RCA) and Balanced (2 x XLR)

Four stereo digital inputs: S/PDIF (1 x RCA, 1 x BNC), AES/EBU (1 x XLR), Optical Toslink

Digital inputs are 24/192 capable

Asynchronous 24/192 USB input board now included as standard

2U high chassis: 3.5" H x 17" W x 11.5"

Six analog outputs: unbalanced (6 x RCA), configurable output levels via internal jumpers

24-bit 96kHz reference class Cirrus Logic ADC

32-bit 192kHz Burr Brown PCM1795 DACs

32-bit, floating-point, 240-MFLOPS processing with dual Analog Devices SHARC DSPs

Included remote control allows control of volume, profile, input and setting of preference EQ

Microphone input has 48V phantom power

Switching power supply

In the box:


DEQX Calibration Software (runs on Windows XP / Vista / 7 / 8

including 64 bit operating systems)

Remote Control

Calibration Kit including calibrated Dayton Audio EMM-6 microphone, microphone and USB cables

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