I think you have things turned on their head. You are trying to solve the wrong problem! You do not need new speakers. Buying new speakers and making the same wrong adjustments will just give you the same problem over again.
The front speakers you are using are rated to go down to 45 Hz, and you should be allowing them to do what they can do. Setting the subwoofers to go so high is a really really BAD idea because you will never get them to operate IN-PHASE with the main speakers, and they are FIGHTING each other rather than aiding each other.
I think what you are having a problem with is CANCELLATION; the subwoofers are cancelling the output of your main speakers rather than helping them in the 50 to 100 Hz range, because you don't have them phased properly.
Set the fronts to operate full-range, and set your subwoofers to only operate up to 50 or 60 Hz MAXIMUM! Play with their maximum operating frequency adjustment in the 50 Hz area until the subs and main speakers work together best.
Limiting the output of your subwoofers to 50 or 60 Hz maximum should improve your bass a LOT. If you have a phase control on the subwoofers you should repeatedly play the same bass-heavy passage from a CD or other source and fine-tune the phase control to minimize the cancellation problem.
A good way to find out how much bass your main speakers really HAVE is to turn off the subwoofers, turn Audessy completely OFF, and run your front speakers with no limits on them. I think you be amazed at how much bass they have when nothing is screwing with them.
Originally Posted by mikeciccarelli
I'm worried that the Pioneer's wouldn't be much of an upgrade.. the rb-61's are rated down to 45 Hz:
FREQUENCY RESPONSE: 45Hz-24KHz ± 3dB
I would be worried that since the pioneers are rated at 130 watts that I wouldn't be getting the drive from the 60 Hz range I'm looking for.. this is speculation though on my part as I haven't heard them. I want LR (mains) that can can keep up with the 15" subs I have now so I can set the crossover at or around 80 Hz... Right now my subs are set to 120 Hz to help with the rb 61's output (aka not enough).. this was automatically set by Audyessey...