The classic DEQX configuration, with a full set of analog and digital I/O. For stereo or HD-Active.


5 digital inputs

2 analog inputs

Speaker correction

Subwoofer integration

Room correction

Balanced outputs

Digital "thru" output

High/mid/low digital outputs

Remote control

What's included

DEQX hardware unit

Your ordered DEQX hardware unit. Every single DEQX unit is individually tested before leaving the factory.

Calibration kit

A Standard Calibration Kit is included with every DEQX. The Reference Calibration Kit is an optional upgrade.

Software USB stick

Includes the DEQX-Cal™ installer, microphone calibration files, and a PDF version of the user manual.

Rear panel - HDP-4 SMPS

Compared to the HDP-4, the HDP-5 has a display/control touchscreen on the front panel, an Ethernet port for network audio streaming (Roon and DLNA), and 12V trigger outputs.

The HDP-4 has an additional set of analog outputs for high-frequency drivers, so it can be used in HD-active configurations i.e. bi-amp and tri-amp. It also has a full set of digital outputs for connecting external DACs (the PreMate has only one, for the main speakers). Finally, it has an unfiltered digital "through" output for use in master-slave configurations.

Yes! The HDP-4 is a superset of the PreMate. To use with conventional passive speakers, connect the power amplifier to the Mid/Full outputs (RCA, XLR, or digital).


Analog inputs and outputs
Balanced Unbalanced
Full scale input level 17 dBu / 5.5 Vrms 9.3 dBu / 2.25 Vrms*1
Input impedance 50 kΩ 50 kΩ
Full scale output level 17.4 dBu / 5.7 Vrms*1 10.8 dBu / 2.7 Vrms*1
Output impedance 600 Ω 75 Ω
Total harmonic distortion 0.0008% 0.0008%
*1. Factory default setting. Jumper-settable, see User Manual for full details.
Digital audio inputs
TOSLINK (optical) 24-bit, 44.1 to 96 kHz
S/PDIF (BNC) 24-bit, 44.1 to 192 kHz, 75Ω
S/PDIF (RCA) 24-bit, 44.1 to 192 kHz
AES/EBU (XLR) 24-bit, 44.1 to 192 kHz, 110Ω
USB Audio Asynchronous USB Audio Class 2, 24-bit, 44.1 to 192 kHz
Digital audio outputs
Digital Through 24-bit, 96 kHz S/PDIF on 75Ω BNC connector. Same as selected input, with no filtering or gain applied. Used for master-slave confgurations.
Digital Low 24-bit, 96 kHz S/PDIF on 75Ω BNC connector. Follows analog "Low" speaker output (with filtering and gain).
Digital Mid 24-bit, 96 kHz S/PDIF on 75Ω BNC connector. Follows analog "Mid" speaker output (with filtering and gain).
Digital High 24-bit, 96 kHz S/PDIF on 75Ω BNC connector. Follows analog "High" speaker output (with filtering and gain).
Audio processing including HD-Active™
Crossover slope 48 to 300 dB/octave (linear phase)
6 to 96 dB/octave (Linkwitz-Riley and Butterworth)
Crossover frequency 22 to 18,340 Hz
Amplitude correction Better than 0.2 dB, typical (depends on measurement accuracy)
Group delay correction 0.5 ms, typical (depends on measurement accuracy)
Subwoofer crossover From 6 Hz, 24 to 120 dB/octave*2
Processing latency Typically 15 ms depending on filters, minimum 2.5 ms
Room EQ Seven or ten bands, 1 Hz to 48 kHz, −300 to +40 dB, Q 0.01 to 17
Preference EQ Three bands, 20 Hz to 20 kHz, gain to +/−9 dB, Q 0.5 to 10
DSP resolution > 140 dB
*2. Maximum available slope subject to filter delay limits.