need help with running stuff from 2 pre-outs on a headunit

[tuckinvy]

i wanna buy this headunit that only has 2 pre outs,
but i am buying a 4 channel for my speakers
then have a 2 channel for my sub
i wanted to know if i can run 1 pre out from my headunit to my 2 channel amp and then using rca cables bridged, run one to my sub and run one to my other 4 channel to power it to then run my 4 speakers(front and rear)
so it will be like this in order:
headunit
pre out to 2-channel
2-channel one side to sub and other 2 channel side to 4channel
4channel to 4 speakers (front and rear).

will this work?
if not how else can i run 2 amps, sub and speakers from a 2 pre out headunit?

thanks alot

[and3rs]

A headunit with only 1 set of pre-outs is no doubt crap and will give you an inferior sound even after spending all your money on good amps, speakers and subs. Spring for a better headunit One with 3 sets of pre-outs is what you'll need so look for that before buying