Crossover alignment with Subwoofers

[jtalden]

Time using the left channel, chirp before and after. LFE 2 Xms means Sub 2 only at Xms delay total, LFE A means all subs played and repeated with timing 5,3,3

Thanks,
The 4 repeats of LFE A all are as expected for SPL delay and all other factors. The is no repeatability problem with your REW measurements.
The 6 delay timing changes to Sub 2 all show no impact of the delay changes. The Impulses are overlaid with each other instead of being offset by the delay differences,

Maybe the Acurus processor does not actually apply the new delay changes entered until another action is taken as exiting that page or exiting the setup mode completely or some other action is taken. If nothing else is found I would even try turning off the processor and returning the delay page to see if the new values are entered.
[The original SPL differences found with your shifted delay settings from (5,3,3 to 10,8,8 or whatever the shift was) could easily be explained if only 1 or 2 of the new SW delay settings were actually made.]

I suggest you investigate this.

 

[IWC Doppel]

Tks, I have heard this before with some processors, I will try exiting the menu and going back in and try the 5,3,3 vs 10,8,8 again !

 

[IWC Doppel]

No difference adding equal delays affects the sub group I added 5ms then 10ms, each time I revered completely out of the menus, changes input and came back in, I did a check at the end. back in line.

 

[jtalden]

Well, I have no other reasonable ideas as to why the SPL is changed with these delay settings.

 

[IWC Doppel]

Well, I have no other reasonable ideas as to why the SPL is changed with these delay settings.

So I assume that if I was to add delay to a them all it should simply move the group ?

 

[jtalden]

Yes.

 

[IWC Doppel]

Ahh, I guess a question for Acurus then ?

 

[jtalden]

Yes.