@peter_s I use an XLS 2502 to drive a pair of Aerial SW-12 subs. When the plate amps failed on the subs (as they invariably do), rather than spend almost $2k on repairing I pulled the amps and bought a single 2502. I also bought a miniDsp 2x4 HD to provide some EQ.
This setup works great. The XLS has inbuilt hi/lo pass features so you can get away without the miniDSP if price is an issue.