Is DEQX a game changer?

Hi Ozzy,

I’ve never adjusted the gain on my HDP-5 via the Control Panel, and I believe that increasing the gain via the Control Panel would reduce the headroom that is available for frequency response boosts that may be introduced for purposes of speaker calibration, room correction, or equalizations that may be desired. In turn resulting in the possibility of clipping the output circuits of the DEQX. I believe that would apply to both the analog and digital outputs.

My present amplifier (a Pass XA25) has relatively low gain (20 db), and what I have done to add some gain is to change the internal jumpers in the DEQX which control the voltage range of its analog outputs that I use to drive the amp. See page 166 of the manual. Relative to the default position of the jumpers that results in a 4.9 db gain increase on the single-ended outputs I use, and I’m pretty certain that is accomplished without any sacrifice in headroom. Those jumpers have no relevance to digital outputs, however.

Best regards,
-- Al

Hi Drewan
I have the hdp5 now and have tried the chord Dave. I have to say it has made me like the deqx even more.

I tried the Dave on its own and the deqx sounded better due to the room treatment. I have tried the Dave as a dac after the deqx and feel it is ok. Maybe slightly wider soundstage maybe I can hear more in the music. However in some way it sounds more smeared if that makes sense. The deqx on its own without the Dave still holds its own and it may be my preference, considering the price difference 

Do you think I need to recalibrate the deqx with the Dave to make it sound better? Is that what you did when you added dacs? 

Thanks Almarg for your post.
I have previously moved the input jumpers to the max position from the default position, but then I noticed that the input sometimes clips on the DEQX control panel screen. So that’s when I went to the DEQX control panel to add 10db gain to the output. The output does not seem to come close to clipping, maybe midway to 3/4 at max on the meter.

Since I own the Premate which does not have a traditional volume control setting, I have to rely on the color of the lights on the DEQX for output volume levels. I like to keep the volume in the "blue zone".
I wish you had the same unit so I could know if my output volume settings is typical with adding the 10db gain.

Merry Christmas!
ozzy

Hi steveo888, I hope you're having a good Christmas

I have only added DACs as source components upstream of DEQX & this has no impact on calibration so that would be unnecessary. I have an external DAC with various digital inputs & also analogue pass through (for a second turntable & SACD player) & this connects to my HDP-5 via the balanced XLR analogue inputs.

It's recommended to re-measure & re calibrate when components are added downstream of the processor.

Anybody have any insight on the hdp-5 and how it compares with any of the following:

Lyngdorf 3400 TDAI  (DSP is done via microphone)

Linn SELEKT (DSP is done using measurements)

Anthem ARC2 (DSP is done via microphone)

https://www.deqx.com/products/hdp-5/  (??)

How does the DEQX stand in relation to the others?