Thanks, the speakers I'm running would be dantax vision 1's. Already running a 4 ohm load. I believe it would be much easier to run a single speaker this way. The post above the guy was running to different polk's. Of course outlaw set up the 2150 to run both a&b at the same time. If I were to run a sub, I would use the preout for that...which would then bypass the lowest frequencies off the speaker so the Dantax basically become a mid and high transducer...depending of course on the cut-off. Thanks!