PC for R.A.B.O.S powered subs for better bass

For the MTS Infinity Preludes speakers that have the powered RABOS subs.

Please from original or pass owners /dealers welcome who sell Infinity Preludes speakers please.

I'm using factory PC and have tried a few PC , and it didn't seem to make any noticable difference.

I would like to keep the cost down if possible , I am willing to hear all of your experiences /suggestions.

Also if you have a contact # or web site for your suggestions that would be much appreciated.

Thank you