Have you tried the F-support Low set to 125Hz on all speakers and subwoofers?
I had the same issue around 85Hz. It was because Dirac tried to fill a sharp null that I have on my subwoofers and front speakers due to placement. Look at your filters, if you see a sharp correction at 40hz, you need to modify your target curve -5dB or so for that area.
What is the support level set to? Did you customize the target curves?
Great idea @temeq . I’m looking more closely at the filters to try and spot a problem. Some of them don’t make any sense to me, so I’m still trying to figure them out. I attached images of them in hopes someone else may spot an issue. It’s a 2.2 system, so there are four filters per main speaker. The measured (uncorrected) response of the main speaker is also in each image. All Dirac settings were left at default values except the target curves were zeroed.
I tried different support levels from -18dB to -1dB. I zeroed out the target curves to be flat.
Is there any chance you have a input for a source. I had the same issue with no speakers last week. Bottoming out but can't spot the speakers. Took all support to 6db. Still bottomed out. I then remembered I had jacked a line to a Nivida Shield. (streaming was fine but 50TB of locally stored movies/ TV were always way lower in volume on the Shield. I jacked the digital input to the shield 6db.
If you tried all support level already, then it is not the issue. May be try a new calibration, and use lower mic and speaker level this time.
Can you show the measured response of those 2 subs, dirac screenshot just like above? Wondering if one or both have issues around 40Hz where they are being used to boost the mains. Sub 2 is always boosting in every screen shot at 40Hz so I'd look there first. The boost doesn't look excessive (looks to be around +3db) but if they (it) are (is) coming from say -10db down at 40Hz and being tasked with boosting for the mains that could cause issues I would imagine. Also, your mains have good in room response to 35Hz (ish), you could try moving the FS low on the mains from the default 50Hz to 40Hz and check the new filters to see if that takes some of that load off of the subs, I would think it would. I know it is the opposite of what you tried already but it's worth a quick test. To quickly negate that sub 2 boost if desired lowering the support level on sub 2 from -18 to say -12 (or -6 if needed) on all speakers it supports should bring that filter line down to or below the 0db line. Start with -12 and calculate and then look at the filters. Sub 1 is always boosting a little above 100Hz so it could be there as well, same thing applies as what i suggested for sub 2 but you could also try a curtain for sub 1 at 100Hz (if it is the problem and it goes away with say a -6 support level). Hopefully you are using the dirac "screenshots" and relabeling them to match what you have uploaded into your filter slots, that allows you to quickly flip back and forth to see filter differences.
That works, raising it outside of Dirac does not recalculate so it's not taking into account all the supporting speakers.
Thanks, sorry just to clarify if you are answering question #2, are you suggesting raising the entire Center curve by say +3db and allowing Dirac to then recalculate has no ill effects even given the fact they the Center is used as a timing reference for LFE. Others have noticed the LFE seems to be more boomy after raising the entire Center by X db and then allowing Dirac to recalculate. If you could please clarify it would be appreciated. Thanks again
Does your AVR/AVP have a center channel trim/gain that is operable with ART engaged? For me, dialog clarity was improved with ART, but I have occasionally raised the center channel to compensate for dialog too soft in the source media. My AVP has a level control on the remote for that purpose.
Yes, It needs to be done in dirac but raising it may make things more boomy. I sometimes roll of the highs just on the center which can often help clarity of dialog.
Here, It's AI but has been mentioned many times (non Ai). I would not do all 3 at once, for me the roll off and slight bump 1khz to 3 or 4 kHz is what I landed on. Boosting the whole channel just rasied the boom and made thins worse.
Thanks that’s what I have done in my custom center curve but still find increasing the trim level +3db helps. Marantz is taking away the trim level functionality so just trying to find another way to simulate it.
Do you have slots for different Dirac filters? You could duplicate your Dirac filter, then make one of them with an increased center channel level for when it is needed.
