[ejr1953]

I would agree, adding bass traps after getting the sub.

In building my current system (in a new room), I got it sounding just the way I wanted it to, then added my subs and all bets were off, it was a real struggle getting it to sound good in the new room, eventually having to install 10 bass traps, using a MiniDSP UMIK-1 calibration microphone and the REW (Room EQ Wizard) software to get the bass sounding right. Before that, the room had such awful "ringing", no matter what the bass player's notes were, the room had one note that it resonated at, that was about as loud as the music. At one point I was thinking of bagging the idea of subs, it was that bad. Now with the bass traps it sounds awesome!