PRECISION AUDIO ENGINEERING SINCE 1997
Even great speakers have more to give
DEQX measures your loudspeakers' individual timing and frequency behaviour — then calibrates the signal so they perform to their full potential.
For three decades, DEQX has pursued a singular vision: to eliminate the distortions between you and the music. Our Gen-4 preamp processors combine reference-grade analog circuitry with transparent digital correction—preserving every nuance while removing the mechanical and acoustic limitations that even the finest speakers cannot escape.
THE DEQX PHILOSOPHY
Thirty Years Proving Digital Can Be Pure
"There was nothing digital about the presentation, nothing" - AnalogPlanet.com Michael Fremmer playing from vinyl sources. (Re Kyron Kronos, DEQX-based system)
The Audiophile's Paradox
Traditional audiophiles rightfully demand purity in their signal path. Yet the greatest source of distortion in any system isn't your DAC, preamp, or amplifier—it's your speakers and room. Even premium loudspeakers introduce timing, phase, and frequency errors that exceed electronic component tolerances by one to two orders of magnitude.
The paradox: mechanical transducers require correction, but correction requires digital processing. And digital processing, many believe, compromises purity.
We've spent thirty years proving this belief wrong.
"Our Gen-4 platform delivers an analog audio path and conversion quality comparable to the finest standalone high-end components. When you use DEQX without any correction processing, you have a reference-grade preamp. When you engage our calibration, you remove the distortions your speakers cannot."
Foundation
Following decades of pro-audio digital music and post-production (Fairlight, Technical Academy, and AES Awards for services to audio), DEQX was founded to deliver 'real' audio to consumers using new-generation digital signal processing.
First Generation
PDC-2.6 introduces the first FIR-based speaker correction and 3-way DEQX-Active crossovers for Pro-Audio, such as Abbey Road studios, for multichannel mastering.
HDP3 Series
First Audiophile preamp processor with speaker calibration and room correction
Generation 3 Refinement, HDP4, HDP5
Audiophile-focused platform gains critical acclaim as analog transparency improves.
Generation 4
A complete redesign evolves from 32-bit floating-point DSPs to 64-bit floating-point multicore ARM processors, delivering an order of magnitude improvement and a stress-free analog path with absolute transparency, with the option to combine with the highest-end analog separates.
Master The Art of Timing
Discover how DEQX corrects time and phase errors to reveal the true potential of your loudspeakers.
GENERATION 4
Three Paths to Perfection
Every Gen-4 model shares our reference-grade analog circuitry and transparent digital architecture. Choose the configuration that matches your system.
Pre-8
The ultimate DEQX experience. Eight channels of calibrated output enable DEQX-Active: the third-generation active loudspeaker architecture, which we introduced.
- ▶ 8-channel balanced XLR outputs
- ▶ Complete DEQX-Active implementation
- ▶ Per-driver impulse response correction
- ▶ 64-bit multicore FIR processing
- ▶ Reference-grade DAC per channel
Pre-4
Perfect for traditional passive speakers with optional stereo subwoofer integration. Four channels deliver stereo pairs plus dedicated low-frequency management.
- ▶ 4-channel balanced XLR outputs
- ▶ Subwoofer integration ready
- ▶ Full impulse response correction
- ▶ Tube-like analog warmth
- ▶ Reference-grade ADC/DAC
LS200-X
The Pre-4 provides balanced and unbalanced outputs for main external amplifier and subwoofers. Digital outputs for the main speakers allow you to utilise a favourite DAC.
- ▶ 5 digital inputs
- ▶ Bluetooth and network streaming
- ▶ 3 analog inputs with optional phono preamp
- ▶ Balanced and unbalanced outputs
- ▶ Digital output for main speakers
- ▶ Speaker calibration and room correction
- ▶ Subwoofer integration
The Experience
Rediscover your music collection. Hear details, emotion, and spatial cues you never knew existed.
The Engineering
Proprietary digital signal processing technology that corrects timing errors at the microsecond level.
The Accessibility
Professional-grade audio calibration made approachable. Setup can be assisted online by our DEQXperts.
The Community
After nearly three decades of installations, join thousands of audiophiles and professionals who trust DEQX.
Trusted by Audio Professionals
Hear what industry experts and audiophiles say about DEQX
"This thing is from another planet! It looks great, the layout and construction are top-notch, and the sound it is producing into my 2½ way system with a compression driver/horn high-end is amazing. The speakers completely disappear, and I'm left with an unbelievable soundstage, incredible detail and a very solid centre."
Greg Timbers
Legendary JBL Chief Designer
"I am unequivocal about my enthusiasm for the speaker-calibration capabilities of the DEQX PreMate. It made my very good speakers undeniably better, smoother and cleaner, and endowed them with a bigger soundstage. It made dense, complicated music easier to resolve, and all music more of a joy to hear."
Kal Rubinson
Stereophile Magazine
"The audible improvements are more pronounced than switching up cables, server/streamer, DAC or amplifier. Such is the power of low-latency group delay correction through DSP. Australians say 'Maaate', I say 'Bloody marvellous!'"
John Darko
Darko.Audio
WORLD-CLASS SUPPORT
Supporting Your DEQX Journey
Whether you're a DIY enthusiast or prefer a white-glove setup, DEQX ensures you achieve the perfect result.
Gen-4 Support
Comprehensive manuals, firmware updates, and direct support for your Gen-4 processor.
- • User Manuals & Quick Start
- • Firmware Updates
- • DEQX-Cal Software
Legacy Model Support
Continued support for our classic processors including HDP-4, HDP-5, and PreMate.
- • Legacy Software Archive
- • Manuals & Guides
- • Driver Downloads
Knowledge Base
In-depth articles on room acoustics, measurement techniques, and system optimization.
- • Setup Walkthroughs
- • Measurement Tips
- • Troubleshooting