Deqx pre8

Hi Ted,

Like me, you must be on the second wave.  Mine showed up a little less than a month ago and it been a tedious process.  I have been told by someone on the first beta wave that we're fortunate to be on the second wave since some of significant the first wave issues have now been worked out.  As you have probably figured out by now the beta UI is stark and not all that friendly, but as I've been assured the final consumer version will be much improved over what we are seeing now.

Have you made your first correction profile yet?  The videos made by Matt at DEQX show the essential basics. 

I've made a few profiles so far but I'm not there yet.

I hope to see more flexibility in the web-based cloud software in the future.  I'm so use to what you can do in the old Windows based DEQX-Cal V3, but Alan told me  "to rethink how the software now works and it has not relationship to the original DEQX-Cal software".  That was good advice.  Yes, it is fundamentally different than DEQX-Cal.

DEQX Pre-8 to using 6 channels for The Apogee original Full Range fully rebuilt and upgraded, powered by 2x H2O S250 SE with two subs.

Thanks for responding. I suggested to DEQX that they start a forum for users to communicate experiences and suggestions, but we’ll see.

i made some profiles and got it up and functioning. It’s very transparent. I plugged REW into it and got some strange measurements though, vey confusing. 
I’ve been using a manual DSP, Xilica, so I’m used to setting driver timing, crossover slopes, and PEQ’s, so I’m missing the ability to control more parameter.  
mic placement seems important.  
I know it’s still in beta, but I’m hoping for increased ability for user tweaking.  
I’m running a usb cable from my laptop into usb input to run REW through DEQX and I’m getting the REW sweep sounds, so I think my measurements are accurate, but like I say, the results are not what I’m used to.

Typically I like a 8db or so slope from 100-15khz, not sure how to achieve that yet. 
the overall sound is very good, but I’m trying tailor the sound more to my liking, and the unit seems so focused on automation I’m having trouble. I’m optimistic about it though, wondering what the final software release will change.

Hi Fellows,

I was in the first wave. There was a plan to set up a forum for users. Have either one of you tried to contact DEQX lately. They have not answered any of my inquiries for three weeks. I'm a bit worried that COVID took to much of a financial toll on them. 

I have a difficult system for the Pre 8. I use dipole ESLs and the comb filtering they produce confuses it. I'm working on a solution to absorb most of the back wave so the 8 can get a measurement on it.

@caglioti you are right. we need more flexibility, manual control of delays and separate EQ for each channel. Right now I have set the crossovers and run it in manual mode, EQing manually. The imaging is not yet what it should be. Rome was not built in a day.
 

@forrestc Which Apogees? I use to have Divas. You have the same basic problem I have, Dipoles, perhaps not as bad as mine as the ribbon is not as transparent to the rear wall reflection. Place the microphone as close as you can to the ribbons, within and inch!  Look at the response curve. If you see it bouncing rhythmically along the x axis you are picking up the comb filtering.  If you go to the Sound Labs web site check out the "Sallie" rear wave absorption panel. I am building a 24" wide version with 8" wedges instead of the stock 6" wedges. If you are not comb filtering then it is a mute issue and you should be able to get a decent measurement.  

Hi mijostyn, Alan replied back to an mail I sent may 30 on June 3. I figured that he must be swamped between further development and answering user questions. I questioned him because was perplexed at the final response curve that I was seeing. I saw significant dips in the final response curve at the crossover points and moreover, it just didn’t sound right. I also mentioned few items relating to the legacy DEQX-Cal v3 that they may want to consider to eventually integrating into the software. Alan assured me that the response curve we are now seeing with dips at the crossover point(s) is not accurate and in reality those dips do not exist in the actual response. He went on to say the they are presently working to correct that issue.

FYI. I get my best measurements at about 16" (40cm) from the ribbons. For me this yields right at 10mS to the first reflection on each speaker and I set the Trim in the Chirp Config there. I really cannot go closer with the mic since the mid-range to tweeter ribbons are passively crossed over and I’m happy at 10mS. I also set the lower limit of correction to 200Hz and not 20Hz as is the factory default. It probably wouldn’t hurt to go as high as 400 Hz I’m thinking, and I’m sure that I’ll try it eventually.

In the meantime, I did work out the issue of bad sound. The issue turned out to be a slight to sever phase difference between the left and right speaker at different frequencies. I ended up playing with the driver distance relationships under the "Create a Speaker" tab, starting by equalizing the distance left to right of the non-zero drivers. It’s probably not perfect, but it now sounds really good now. I have not integrated the subs as of yet. I’m trying to work out as many of the issues with just the main speaker first before adding a whole new mix of issues surrounding sub integration since it is done way differently than in DEQX-Cal.

Of yes, the Apogees I’m using are the original "The Apogee" which was their very first model with all steel frames and weigh about 300 lbs each.

http://www.reality-audio.com/full_range.html

Oh, one more thing. Does anyone know how to do a Volumio Plug-in on the Pre-8?

I opened a ticket with Volumio  about two weeks ago but it's still in the "pending" state.