Smoother bass by running woofer out of phase?

I am assuming that BOTH speaker systems are being wired with woofers out of phase.

First, some crossover networks, having a 180 degree phase shift between woofer and tweeter, require that the two drivers be connected with opposite electrical phase. Some other networks having 90 degree phase shift, are "wrong" (electrically) no matter what you do.

If one connection (chosen by the designer) yields flat response through the crossover frequency, then inverting one driver will cause a deep notch at the crossover frequency. (In fact this is the best way to measure the crossover frequency). Perhaps your room has a resonant peak around the X/O frequency, or, more likely, you just don't like that frequency.

I third setting up on the long wall. No question about it.

In addition- only 50% or so of recordings actually maintain absolute phase, so who knows what you are actually hearing. Just because your wiring is in phase doesn't mean your music is.

Robr45...Absolute phase or not, the woofer and tweeter should be the same.

The OP is explicitely talking about changing the phase on the woofer for smoother bass.

by the way, have your outlets checked for polariy...mis-wiring can give you an out of phase effect!!