Set distances to zero in AVR before time aligning subs?

[matthewacker]

Sorry if this has been answered many times but I didn't see it specifically said in videos and couldn't find a thread here after looking for a while.

When doing time alignment of subwoofers in REW do you first need to remove all distance settings in your AVR?

I measured the distances for my front subwoofers and put that value into my AVR. It's about 15 feet.

I am running the sub out on my AVR to a miniDSP 2x4 HD to 4 subs.

Should I set my sub distance to zero and then do time alignment in REW?

Or should my distance settings not matter in my AVR?

Thank you,

Matt

 

[JStewart]

Either way so long as you are aligning the subs to each other using the 4 outputs on the MiniDSP and then aligning the resulting aligned subwoofer group to the mains.

 

[JStewart]

And welcome to the forum!

 

[matthewacker]

Thanks J. Are there any good tutorials on aligning subs and mains?

 

[JStewart]

Thanks J. Are there any good tutorials on aligning subs and mains?

Should be something on YouTube by now you’d think.
You want to use REW’s alignment tool.
To use it you’ll need to take measurements in REW using a timing reference. Info partway down this REW help page.

Making Measurements

A basic idea of the tool here:

MiniDSP Sub Setup

Currently have have Audyssey turned off and have changed the distance measurements (laser measure) Since you didn't mention the subs specifically I'll add that even with only 1 sub the actual physical distance setting is not likely to be the correct one. Of course with 3 subs a physical...

www.avnirvana.com

Member @jtalden ’s practice REW files:

REW Alignment tool - Guides or Manual?

I analyzed both 80 and 100 Hz XOs. The SW XO timing of both was already at the most favorable setting. It would be the conventional target for this setup. There was no indication that FL+FR sum was showing that large dip around 65-100 Hz that we were trying to avoid. Even though the SPL is now...

www.avnirvana.com

@jtalden ’s guide to measurements needed:

Regarding multi-sub alignment, sub to main alignment and EQ set up

Hi, Just want to get a few things clear regarding multi-sub alignment, sub to main alignment and EQ set up. I been using REW a few time and know the software I believe quite good, but don’t always know how to set up measurements or how to do the analyses. Just did some playing around a few...

www.avnirvana.com

The trickiest part for many seems to be figuring out how to get measurements using REW’s acoustic timing reference.
If you find yourself in that place then post your measurement devices and signal chain devices with types of connections and someone will be able to help assist.