[BruceSB]

Attended a DEQX Roadshow event on Friday night.
I have attended DEQX demos at HiFi shows but this was a whole new dimension!
As I already knew the DEQX is not at all subtle!!!
But Friday night gave a much better opportunity to hear the DEQX over an extended time.
In addition to the listening Alan from DEQX explained heaps of details about the product,
AND,
He was available to answer questions.
Yes, I came along with my questions and I was very impressed by both his knowledge and his honesty.
What a great night!!!
If you get an opportunity to go to a DEQX roadshow grab it!
The DEQX is a very impressive product with some fantastic people behind it.
Bruce

[lowtech]

Good product with software that has been in "beta test" for 7 years and running.  http://www.deqx.com/beta/

Result of DEQX beta software on my tweeters:



When the unit works it works very well.

[richidoo]

That is cool! I have heard DEQX many times on Selah Audio speakers. It really can sound fantastic when dialed in correctly. Learning how to do that can be a steep learning curve, from what I've heard from friends who own it. But I'd love to try it. Where was the roadshow? Do they publish a roadshow schedule?

lowtech, that is a sad picture of your tweeters! Hopefully you have passive attenuators in place for future tests. I assume they also offer final version software for those not willing to risk being beta testers?

[lowtech]

lowtech, that is a sad picture of your tweeters! Hopefully you have passive attenuators in place for future tests. I assume they also offer final version software for those not willing to risk being beta testers?

Not over the three year period I owned two of them.  The link in my prior post seems to indicate that their current software is still considered "beta" (it's the only download link).  http://www.deqx.com/upgrades.php

I'm afraid attenuators would not have helped for my use case travesty.

Like I said, when the unit works it works very well.  The calibration process is nearly automatic, which makes it easy to use (just keep your fingers crossed when its running).

[jrhill]

Can you 'dial-up' each output's eq curve separately, including the phase response? Particularly if the left & right speaker, subs,  and room responses are not equal/similar, as so often happens.

[JoshK]

You are always suppose to use a large value cap in series with a tweeter in an active system.  This is protection not unlike a fuse.  It's the one passive component that should never be omitted.   When one measures speakers one still uses the cap on the tweeter for protection. 

[roscoeiii]

Love the DEQX in my system. The HDP-4 is a great unit. Though yes, the learning curve is steep.

[JohnR]

Where was the roadshow? Do they publish a roadshow schedule?

They were in Brisbane and Melbourne AU. I don't know if they have anything planned for the US (I suspect not) but I believe they do attend RMAF regularly.

There's nothing I can see in the current version of the software that indicates it is "beta" software... 

[JohnR]

Can you 'dial-up' each output's eq curve separately, including the phase response? Particularly if the left & right speaker, subs,  and room responses are not equal/similar, as so often happens.

My understanding is that the target curves for FIR correction are flat amplitude and linear phase. You can measure and correct left and right speakers/drivers independently. For the room EQ the settings are the same for both left and right. (I'm not sure if that helps?)

[lowtech]

You are always suppose to use a large value cap in series with a tweeter in an active system.  This is protection not unlike a fuse.  It's the one passive component that should never be omitted.   When one measures speakers one still uses the cap on the tweeter for protection.

Yeah; in fact, I was.  Tell that to my mid woofer that was also cooked.  The problem is that their buggy software did something that it should have not done.  It wasn't like I was playing the test sweeps too loudly.  It was a catastrophic failure due to a bug in their code, which of course "had never been reported before" by anyone else.  I was a beta tester for a few years and only had one problem; it was my last.  Like I've said twice now, when the unit works it works well.

The calibration process is wizard driven and produces several warble tone sweeps.  When it's done, you're done.  If having it do a crossover for you, you can specify parameters like crossover point, slope, point at which to start calibration correction, etc.  Once it's done you can then optimize low frequency room response using IIR correction.  What it couldn't do, and maybe this has changed over the years, is set a target response for the optimizer.  When I had my units it would always optimize to a ruler-flat line.

[lowtech]

They were in Brisbane and Melbourne AU. I don't know if they have anything planned for the US (I suspect not) but I believe they do attend RMAF regularly.

There's nothing I can see in the current version of the software that indicates it is "beta" software... 

The URL should be a dead giveaway: http://www.deqx.com/beta/

Or, go to their main download page at http://www.deqx.com/upgrades.php.  Click the download link, click cancel then look at the URL you were denied access to.  This is what I see:

[BruceSB]

Hi lowtech
Alan did talk about the software, named their only two competitors, mentioned how many tens of thousands of lines of code in their software and so on. Seems you get the latest software when you buy their units and they set your system up for you and train you in its use.
There is a setup service called DEQXpert where Alan takes control of your computer over the internet and does the calibration or comes to your house.
I am sorry that you had problems but they were at great pains to point out the vast improvements with the new models.
I suspect that you might have to buy a new unit to get the latest software.
All I can say is that from my point of view I was impressed by the quality of the product and the integrity of the people.
I am anticipating buying a PreMATE in the fairly near future and I would not be laying out my cash if I was at all doubtful of the people or their product.
Hope you are able sort things out.
Bruce

[BruceSB]

Just a quick extra.
I attended the Melbourne Roadshow.
Bruce

[Rick Craig]

I've had no problems with the DEQX damaging drivers (both myself and customers). The only issue ever reported to me was from a customer with an amplifier meltdown that cooked a RAAL tweeter. The ribbon element was replaced and everything was fine.

[lowtech]

I've had no problems with the DEQX damaging drivers (both myself and customers)...

That was my experience 99% of the time too.  It's a good, innovate product that has probably matured a lot in the 8 or so years since I owned mine.  They can do "magic" and make any speaker sound a lot better, especially you're using the full capability of the unit (by using it as an active multi-way crossover).

[roscoeiii]

I keep toying with the idea of bypassing my speaker's crossover to use the DEQX in an active setup.

[JoshK]

I seriously regret selling my HDP-3B.  I never got to use it for its worth cause I was getting a divorce and didn't finish building my speaks.   Now I have the speakers, the time and knowledge, plus I don't party as much. 

[JDUBS]

I had a deqx for a while and it was pretty good.  Easy to use and all that.  But, then I tried convolution filters created by Audiolense and Acourate and haven't looked back.

Much more flexible plus you're not tied to one specific piece of hardware (can use any number of pro audio interfaces).

-Jim

[BruceSB]

Don't forget that the DEQX is so much more than an active cross over!
It is a room corrector, pre amp and DAC as well!
The DEQX people are really proud of their DAC.
They think it is really good but very under rated!
Switching it in and out is not at all subtle.
Yes, I was quite impressed by the Road Show!
Bruce