The American way...two is better than one, and bigger is better! :-)
Seriously though, I too use two subs and with the little on-board one band EQ, phase, level matching, and good placement, I have gotten them to blend in seamlessly with my mains.
IMO, this cannot be done by ear, and even with the RS meter it is nearly impossible. Especially setting the phase. I now use ETF measurement software, but the Velodyne SMS-1 very effectively uses a test tone sweep and microphone. Even if you don't EQ them, this way of measuring them and graphically displaying the results really helps the set-up process.
I cannot imagine how people do this any other way.
Seriously though, I too use two subs and with the little on-board one band EQ, phase, level matching, and good placement, I have gotten them to blend in seamlessly with my mains.
IMO, this cannot be done by ear, and even with the RS meter it is nearly impossible. Especially setting the phase. I now use ETF measurement software, but the Velodyne SMS-1 very effectively uses a test tone sweep and microphone. Even if you don't EQ them, this way of measuring them and graphically displaying the results really helps the set-up process.
I cannot imagine how people do this any other way.