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Hi All
I've seen several posts and other web information, but haven't seen any comments on using DDRC-24 / Dirac Live with bi-amped bookshelf speakers and sub woofers.  I'd like to use the 4 x 15" speakers (and the Ashly FET-500 amp) subs along with the Alesis prolinear 720's.  From reading here, it seems best to use REW to align and perhaps EQ the subs.  I'm not sure where to go from there.  Should I use the Dirac on the subs alone or the bookshelf speakers alone, or on the combination ?
Thanks
Terry

Hi,
Presume output 1 and 2 will be used for mains (daisy chaining to a couple of amps or using 'y' phono leads and outputs 3 and 4 will go to your subs.

How brave do you feel? I'd follow this tutorial and use MSO. www.minidsp.com/applications/subwoofer-tuning/dual-sub-with-mso
Follow it step by step and you'll be ok. MSO will work out the best crossovers and do all the time alignment for you.

Let Dirac loose on the lot.

 

Thanks asx77, I'll look at the tutorial.  Seems like it might be what I need.
 

One other thing.. I had my dual subs in each of the front corners at first. Then I tried putting one in a diagonally opposite corner. For me it was more awkward to hide/run the cable but it worked brilliantly. For all positions on my rear wall sofa one sub is FLAT up to about 43Hz then the other one joins in and is reasonably flat from about 40Hz to 100Hz. Combined the bass in all positions is as flat as a pancake. I might have got lucky with my room but morale of the story: try different sub positions and measure individually with REW before anything else. Have fun!

I can see where that might make a difference.  With the shape of my room and furniture, the two identical sub cabinets have very different response, with one having a 10 db dip at 107Hz vs the other.  They generally match at all other frequencies.

But if they don't have a flat response you don't want them to match. I think MSO likes to have subs respond differently so it can pick and choose between them.