DEQX™ for Audio Professionals and Studio Use

DEQX corrects frequency response and time domain errors in passive or active monitors and measures as well as correcting room anomalies. The DEQX processor features two inputs with 3-way active stereo outputs incorporating DEQX steep linear-phase crossovers. Or use DEQX to correct any two-way main speakers and use the low-frequency crossover outputs to time-align mono or stereo subwoofers.

DEQX not only corrects frequency-response errors but uniquely timing errors caused by group delay. Individual driver distortion is also reduced by ensuring that each driver works in its ideal operating zone, something that shallow passive crossovers rarely allow. Drivers distort less and play louder when each driver’s acoustic energy is better segmented. DEQX makes this possible with linear phase filters up to 300dB per octave. Time-aligned steep linear-phase crossovers virtually eliminate crossover distortion.

Less distortion means lower listening fatigue, essential for today’s audio engineer spending long hours at high levels listening for the finest details. It has to be said: Studio professionals using DEQX technology wonder how they ever lived without it! (Our user base is enthusiastic.)

Freelance engineers can take a DEQX processor with them to studios rather than tote large, back-breaking speakers. Not only does DEQX correct any speaker response problems, it also compensates for room problems allowing unheard of consistency between studios and other facilities. Connection is a breeze, simply insert the DEQX processor in the monitoring chain before the amplifiers, it’s that simple.

DEQX steep linear-phase filter slopes allow lower crossover turnover points so bass and midrange drivers don’t “beam” or overhang which masks frequencies above. And you’ll be able to play louder without distortion, how much depending on how low the crossover frequencies are set. Typically using DEQX processors they can be reduced by one-half to one-octave!

DEQX seamlessly integrates your main speakers with one or a pair of subwoofers in existing single-channel active or passive monitors . Using two subwoofers results in improved efficiency and less distortion but time aligning the subwoofers and main speakers is incredibly important and often overlooked in many audio and surround sound installations.

Let’s say the subs are located 4-feet away from the main speakers representing about 4 milliseconds at the listening position. Time-alignment delivers a much more coherent bass wavefront compared to floor-standing full-range speakers where bass energy echoes from rear and side walls. DEQX calculates the exact delay required for phase-coherent integration of the main speakers and subwoofer(s).

Although active DEQX XO™ requires more amplifiers they only have to drive a few octaves rather than traditional powerhouse amps that have to push ten octaves at full power... faultlessly. That’s a tall and expensive order. But an active XO setup lessens the demands on each amplifier reducing distortion while simultaneously reducing intermodulation distortion of the speakers’ own bass and midrange drivers.

Pick your amplifiers accordingly; high power and good damping for the bass and lower power more highly resolving amps for the midrange and high frequencies. Even if the same amps are used for each frequency band their performance will be improved because of limited power-bandwidth load. You can’t lose!

DEQX includes a remote volume control and post-DAC analog volume control on all outputs maintaining full digital resolution when monitoring at low volume. 5.1 surround systems use three units since each processes two input channels. PDC units are available with 19” rack mounting hardware.

Inputs include 2-channel analog (balanced and unbalanced) and digital (AES/EBU and S-PDIF). Processing is accomplished with 40-bit floating point precision and given 24-bit/44.1 to 96kHz processing turns out truly professional results. DEQX outputs typically drive amplifiers so unbalanced analog on RCAs or XLRs are standard. Your choice of digital outputs includes AES/EBU and S-PDIF. If you need both analog and digital we provide a 2U rackmount setup.

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