Using iMac 27" + ACD 24" speakers at the same time

[Rafn]

Hi all!

First of all; I'm new to the forums! Yey!
Second; My english may not be the best, but I do my best

I'm looking for a way to use both the iMac 27"s and Apple Cinema Displays speakers simultaneously.
The way it works "out of the box" is that you can use EITHER the iMacs speakers, or the ACDs speakers. I want to use both

Is this even possible without buying additional equipment?
I've been searching the interwebs for quite some time now, and even google had to let me down on this one.

Any good solutions out there?

Thanks in advance!