Wayne Parham Messages: 19081 Registered: January 2001
Illuminati (33rd Degree)
Be sure to use flanking subs for two of your subs. That is part of the overall system design, because it not only contributes to modal smoothing but also to baffle-step compensation and SBIR mitigation.
Then place the other two subs in a Welti or Geddes configuration.
Actually, by the time you get to four subs, most agree that it almost doesn't matter where you put them as long as they aren't grouped together. You can choose placement where is most convenient or placement guided by measurements or a by a little bit of both.