hp1kw

Ok, so I figure my setup will be as follows:

1) Front Stage will be Alpine Type-Rs Bi-amped.
2) Center, rear fill, don't care.
3) 2 Old School Boston Acoustic 10.4LFs.

I will drive the front components with an old-school Soundstream Rubicon 600.4 and the subs with an Alpine PDX 1.1000.

Ok details out of the way. I plan on purchasing a JL Audio Cleensweep as I only care about the front stage and the subs.

My question is, should I run the sub amp off the Cleansweep from the front channels, or is the stock Amplified Signal to the sub ok to run through the JL unit. I am afraid of cascading crossovers (Alpine amp and stock amp).

Thanks for any advice.