Subwoofers

Actually I've decided to go with a Rythmik L12 sub based upon some of the reviews I've read. $539 shipped for free.  

Every Rythmik sub is hard to beat at it's price point, including the L12. Direct-Servo Feedback (at $539!) among it's highly-designed strengths. Brian Ding is not your average designer.

I've decided to go with two rythmik F12G
powered subwoofers.  I need to set them up through my Quicksilver Line stage preamp.  My question is with one set of outs on the preamp what is the best way to split the signal ? 

Mike 

I use a Media Bridge Y - connector from my PA to each Rythmik F12G sub, an easy and cheap solution to hook up both subs to a PA. 

Anybody have feedback fir me about the Pinnacle Baby Boomer??
It lists power amp of 600W ...BUT doesn't state RMS.
Is it musical?  My speakers need some help down low.  Don't need loud bass ( to bother my apartment neighbors), but a bit more oomph on music ( and films too).