When I had my system setup with the 312RS's the most common comment people made were "it needs more bass" The system was setup with a shure mic and a spectrum analyzer and I set it up to be as flat as possible with both windows about an inch down. Dropping the windows seemed to help standing wave a lot. With windows up I just dropped the bass down alittle most of the time.
A few friends thought it was one of the best sounding systems they had heard. It was near flat down to 50Hz with a few dB gain between 30-40Hz. When I swep the 312RS in the box they were very very good from 30Hz to 1200Hz without a crossover. They have a somewhat short excursion and a rating of 350W per coil. But they sound REALLY tight and flat. Theres no comparison between them and your typical Alpine or kicker sub that seems to produce 60Hz and have a steep roll off on both sides.
Wish I still had access to that spectrum analyzer. All the ones we have at work here only do above 100MHz. They do up to 15GHz tho, but totally useless for audio. Also used to have access to a distortion analyzer.
