Tweaking my "Hafler circuit" pseudo 5.1 setup

[olds1959special]

I put the rear subs/speakers back but connected them to a second interface using drift correction. Also I put the center sub back but didn't use the center speaker. Not the Hafler circuit but it allows me to take better advantage of my miniDSP (used to add crossover and adjust front R/L sub level + EQ) and I get a kind of surround experience. I assume the device with drift correction enabled will be delayed but a small delay in the rears is okay, even desirable I think.