Run sub correction before running Dirac ?

[spike99]

Looking to get an AVR with DIRAC.

My JL Audio F112 sub has its own room correction. Question is... should I run sub room correction then run Dirac ? Or disable and let Dirac handle any room correction.

Thanks.

 

[Timcognito]

My Elac sub that has its own app said to do that so I did, but did make a difference? Not sure.

 

[spike99]

OK... My current AVR, I use Audessey... I do run my sub room correction first then Audessey... I suppose the idea is for Audessey would have less work...

 

[fieldcar]

That's a tough question that may only be verifiable if you check the results with REW and a UMIK.

Possible Pro: The sub's internal limiter will be aware of the correction, this means that it can better handle large dB swings. This is what I'd do though.

Possible Con: Unlikely, but the phase shift from the correction may be a bit wonky or extreme, and you may notice issues with music.

I'd actually recommend 10-12 measurement points at and above MLP for DIRAC/audyssey. I find that I run into issues with my leather couch's headrest acting like a wall, and I get really funky mid to high corrections where pink noise post-correction sounds abysmal compared to bypass mode. I think this is why audioholics recommends bypassing correction above 1000Hz at the transition frequency (room-to-speaker). Though, I still prefer correcting the speaker full range.

Main takeaway is to play around with it and learn. That's what I did. Oh, side note, you can usually verify the pink noise with something like specdroid on android or another FFT app on an iphone.

Best of luck!

 

[spike99]

I actually just purchased a UMIK-2. With the intent to check my room and see what is the difference between REW and my current XTZ Room Analyzer. I got the XTZ Room Analyzer probably like 9 years ago... and since there is no update to the software... I figured REW was best. Very surprised with the difference between REW & XTZ. I have a huge dip around 100Hz and some other higher frequencies... Surprisingly, frequency response looks good below 70Hz... but the rest... not so good.

Hence, looking to get Dirac.

Also, my room is very small... Although I have 2 subs.... I'm only using one... but after checking freq response... I'll be looking to use both subs...

 

[Kal Rubinson]

Very surprised with the difference between REW & XTZ.

I would be grateful for a brief description of the difference in results.

 

[DWPress]

I've recently gone through trying DLBC to integrate 2 subs with my active XO mains and tried all sorts of variations on subwoofer(s) crossovers, corrections and phase work in advance. I tried removing the XO between woofer and subs to see what Dirac would come up with, it was terrible. Another attempt was to use shallower slopes in the XO, another disaster. DLBC claims to automatically adjust these things but my best result was to fully level match, EQ the humps off the subs and set a XO at 73Hz before letting Dirac have a whack at it. Essentially now DLBC is only taking care of bass phase and time integration as I'm only using it up to 125Hz, well below the transition zone of my room. It sounds about the same as my manual corrections just using REW and rePhase.

 

[spike99]

I would be grateful for a brief description of the difference in results.

Difference was from memory... but will dust off my XTZ and do a comparison... will put 2 graphs to show difference....

Will get back.

 

[spike99]

I would be grateful for a brief description of the difference in results.

The only difference is that I used XTZ MIC vs UMIK with REW... Mic was placed in MLP. I also used a mic arm... so MIC position is the same for both.

Looking at results... They are somewhat similar between XTZ vs REW.