The latest DEQX-HD™ capable processor is aimed at the audiophile and professional seeking
the ultimate DEQX implementation. Based on the same ground breaking features provided by the
acclaimed PDC2.6P Preamp/Processor, the HDP-3 provides further analogue transparency
in a new larger chassis with analogue power supplies and further enhanced analogue electronics.The HDP-3 is a stereo digital processor offering DEQX’s patented speaker and room correction
technology. When connected to a PC running DEQX’s software, the HDP-3 allows you to measure
and correct your main speakers and subwoofers using its largely automated wizard-driven
measurement, analysis, and correction software.Our loudspeakers introduce between ten to one hundred times more distortion, as well as errors in
the form of inaccurate frequency-response and incoherent timing, than the signal that drives them.
Unlike DSP room correction systems, whose measurements must contain room acoustic effects,
the HDP-3 first measures and corrects a speaker’s native (anechoic) behavior so that frequency
related phase (group-delay) errors and frequency-response errors can be corrected in detail before
measuring and correcting room acoustics.The HDP-3 can be used for correcting passive speakers and optionally integrating one or two subwoofers, followed by room correction. If used to provide DEQX-HD™ active implementation,
where each driver type has its own amplifier, the HDP3 corrects each driver individually. The HDP’s
six outputs providing up to 3-way active crossovers. Configurations supported are; passive speakers
plus the option of one or two subwoofers, 2-way active speakers plus optional subwoofers, and
3-way active speakers.Stereo digital and analogue Inputs include: SPDIF (RCA), AES/EBU (XLR), unbalanced analog
(RCA), balanced analogue (XLR). Standard outputs are analogue unbalanced (RCA). Optional
outputs include balanced analogue (6 x XLR) OR Digital outputs (3 x XLR, 3 x RCA).  Multiple HDP-3
units can connected together for multi-channel surround configurations such as 4.2 and 5.1 to 7.7
configurations. For Home Theatre use, it is possible use only one HDP3 to correct front Left and
Right plus subwoofers only, where most soundtrack music is provided. The HDP3 can automatically
select its digital input when it senses a stereo PCM output from a stereo CD or DVD player (up to
24-bit 96kHz), defaulting to its analogue input for front left/right film soundtrack playback.The Preamp features of the HDP-3 include six digitally controlled analogue volume controls that allow
the DACs to operate at their maximum resolution at low listening levels. The remote control provides
volume control, input selection, four different speaker and room correction profile selections, and Lo,
Mid, Hi, tone controls where the mid control provides a fully parametric EQ band. 100 tone control
settings can be saved and recalled from the remote control.The industry leading SHARC 32-bit floating point DSPs from Analogue devices combined with
DEQX’s software contribute less than 0.0001% distortion and noise. The HDP-3 contains improved
power supplies and analogue electronics to preserve the system’s digital processing transparency
to audiophile requirements.If you are not utilizing the services of a DEQX installer and intend to measure and correc
your speakers and room yourself you will need either the Standard Calibration Kit or
Reference Calibration Kit. For high end ‘speaker’ correction (as distinct from room correction),
it is recommended to use the Reference Calibration Kit that provides the Earthworks microphone.
The Standard Calibration Kit proving the Beringher microphone has a 20kHz high-end correction
limit—the HDP3 however will pass up to 40kHz. Click for HDP-3 information sheet.