Mine works fine with dual subs running from the 568.2mm off of the 5/6. That said, I am using the Meridian firmware v2.12. I have 5 DSP33s and 2 D1500 subs. When I tried to use it with 2.5b9 the 568 just didn't work [Bad Software errors]. After a week of messing around with this task I am convinced this is a 2.5b9 problem.

A referral from Mr. Meridian to a Meridian expert convinced me that for my needs, the 2.5b9 was no benefit. I'm now after a HD621 to complete my set up.

G61R, HD621, 3xDSP33 (front, center left), 2xD1500 subs, 2xDSP420 (rears), Sonos everywhere.