Need help in building Ucd module based power amp for bi-amp

Hi all,

I would like to build two Ucd module based power amplifiers for bi-amping. The problem is my existing pre-amp has one set of pre-out only. How do I daisy chain two power amps from the pre-amp? Is there any trick in doing so? Or just simply cram 4 Ucd modules into a single case? Any suggestion is welcome. #-o