Question on how to integrate a sub

Thanks Bob, much appreciated.

In my system, Hooking up the sub using the speaker-level inputs made integration easier and more effective. I think you will find others who have had the same. The sub just seems to blend in. Of course, your sub must support speaker-level inputs.

I was wondering, could if I use one set a balanced out to my bryston amp, could I then use a y connector on the rca out and into the sub? Would this adversely affect transient response or anything else?
I tried to find a paradigm x-30 and so far no luck.I don't think they make them anymore.