dbphd, you just run the subs independently and set them up independently. I use JL Audio subs exclusively when I set up systems for people and have had no problems integrating them into a number of different situations. I set up 2 F112 v2's for a fellow with older Watt Puppies and several pairs of F113's with Magnepans. They are as well or better constructed than any other commercially available sub in my experience. I have seen several v1 subs get into trouble but JL dealt with them appropriately. All of the v2 subs have been great. As an example of their build quality you will notice that the corners of the enclosure have been radius-ed. This is nice in a lacquered unit because sharp corners are much easier to damage and have the lacquer flake off. They also use a polyester lacquer which is tougher than standard catalyzed lacquer but a lot more expensive to apply. The F113 is $1000 more expensive than the F112 and I think worth it. In both cases make sure you get a v2 unit not a v1!
JL Audio F112 v2 subwoofer - worth the price?
I am looking to purchase a somewhat compact sub (max width ~15 inches) for my den (dimensions 17' x 11'). My speakers are centered along the longer wall. The sub will be paired with Buchardt S400s powered by 2 Schiit Aegir amps running in monoblock configuration. The JL F112v2 has piqued my interest. Seems like a compelling option given its reputation for musicality, coupled with highly-regarded EQ. It will also fit my size requirements. The price is quite daunting though, but doable if I buy pre-owned. Are there any more wallet-friendly options out there that could match (or possibly exceed) the performance of the F112 for music (I care much more about music than HT). I think EQ is a must, either as a separate component or built into the sub.