HDP-4

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.

What is the difference between the HDP-4 and the HDP-5?

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.

What is the difference between the PreMate and HDP-4?

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.

Can I use it with full-range (passive) speakers?

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).

Specifications

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.