Question on how to integrate a sub

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.

When I tried using both my balanced (to amp) and unbalanced (to sub) on my EMM Labs DCC2, it created problems with overall transparency and dynamics - but this could just be specific to the DCC2.

I agree with the others that you will likely get better integration by using the speaker level inputs if available. The sub will take on the bass characteristics of your amp and blend more naturally with the mains, IMHO.

I just ordered an nht x2.
Thanks for the input guys