DEQX Software, Firmware and Upgrades

PDC-2.6 & PDC-2.6P upgrade to HDP-3
PDC-2.6 & PDC-2.6P upgrade to HDP-3 order form
Cal beta 2.58 software upgrade (for advanced users only)
Calibration 2.0 software upgrade
Microphone calibration files
PDC-2.6 & PDC-2.6P upgrade to HDP-3

As you may have heard, we are now shipping the new HDP3 (PDC-3) processor/preamp, and will
have information on the website.

The HDP3 is the culmination of a lot of experimenting regarding sound quality through the PDC's
ADC, op-amps and DACs, as well as power supply and related issues. The unit is based on the
PDC-2.6/P Rev-6 PCB that many of you have, where there are changes to main PSU, grounding,
EMI filtering, op-amps and capacitors.

The results have been stunning. We believe we've achieved outstanding quantum improvements,
including where the switching power supply remains! Another factor that has helped the success
of this process have been the recent introduction of a new generation Op-amp. However, the
improvements we have settled on use a variety of high-end op-amps depending on their function.

For example, dual 300V/microsecond slew rate op-amps with high power driving capability are used
to drive the AKM Analogue to Digital converter and two each are used for each of the six DACs for
current to voltage conversion. All other signal paths use new generation very low-noise,
low-distortion op-amps.

Another area where changes have been made is with regard quantity and quality of bypass
capacitors, while any in-line capacitors have been changed to new gen, very low ESR
(and musical) capacitors.

Upgrade options:

Option 1) PDC-2.6/P HD limited edition
(available for all serial # PDC-2.6 and PDC-2.6P)

This is the most affordable upgrade because it can
be installed in your present PDC chassis, although
we need to supply a new chassis cover. If you have
a PDC-2.6 or PDC-2.6P with a serial number
above 0411001, then these changes are essentially
the same as now incorporated in the new HDP3
processor, less the analogue power supply. If your
serial number is prior to that, the changes can still
be made, although the benefits of latter PCB layout
changes will not be as effective.

The changes are as follows:

1. New black textured powder coat chassis cover
with improved ventilation. This is required because
the new analogue section draws more power than
the existing PDC 2.6 and PDC-2.6P.

2. Mechanical modifications to both analogue
12-volt regulators to allow higher power output.

3. Multiple Low ESR FM series bypass caps added
to the main +/-12V rails.

4. Low ESR FM series bypass caps added to the main +/-15V rails from switching supply.

5. Multiple Low ESR FM series signal caps replace existing caps in signal path.

6. Extreme high speed, high drive current op-amps added to drive AKM Analogue to Digital Converters (ADC)

7. Extreme high speed, high drive current op-amps used for six channels of DACs current-to-voltage
I/V conversions

8. Very low noise, low distortion op-amps used in
input stages to ADC driver op-amps

9. Very low-noise, low distortion op-amps used in
all DAC filters and output buffer stages

10. Miscellaneous modifications

11. Additional 12-month warranty for serial number
above and including 041101. Six-month warranty
for units below S/N: 041101 (which will be older
than 3 years).

12. Unit notated as Special HD limited edition.

13. New return packaging.

14. Return freight included

Option 2) Full upgrade to HDP3
(only available for SN:041101 and above)

This upgrade requires the PDC-2.6 Rev6
board and so is only available to PDC-2.6
and PDC-2.6P units with serial numbers
above 0411011.

This is a complete upgrade to the new HDP3
using your modified PDC-2.6 Rev-6 main
board. The serial number will remain your
original serial number but with the HDP3 suffix
to differentiate it from new PDC3 units.

This upgrade includes:

1. Items 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 14 as
in option 1 upgrade left.

2. New 2U high PDC3 chassis (double height
of PDC-2.6) with brushed black or brushed
silver anodized 12mm front panel.

3. Allows both digital outputs and balanced
analogue (transformer or electronic) outputs
simultaneously.

4. Analogue +/-15V 60VA main power supply— switchable 115V or 230V.

Click here to complete the form to request your upgrade.

Cal beta 2.58 software upgrade (for advanced users only)

The latest beta software. Suitable for use on a Windows XP or Windows 2000 PC. This includes beta firmware v63.3. Please note: DEQX recommends that new DEQX owners first use the official release software to become familiar with DEQX technology before downloading and using beta software.

…download upgrade (exe)
…download notes (pdf)

Calibration 2.0 software upgrade

The latest official release of the DEQX Calibration software. This is the software for use on a Windows
XP or Windows 2000 PC.

…download upgrade (exe)

Microphone calibration files

Each microphone supplied by DEQX is individually calibrated and is engraved with a serial number. Look for the serial number on your microphone, then find and download the file containing that number from the list below:

Behringer Mic Files:
B8-00002 - B8-00100 …download (mic)
B8-00101 - B8-00199 …download (mic)
B8-00200 - B8-00300 …download (mic)
B8-00301 - B8-00388 …download (mic)
B8-00389 - B8-00403 …download (mic)
B8-00404 - B8-00437 …download (mic)

Earthworks Mic Files:
Earthworks All Microphones …download (mic)