How do I hook up a subwoofer for 2-channel


I want to use 2-subs in a 2-channel system.I am going to use either Rel or Martin Logan. Which ever one I decide to go with How do you connect the wiring so that one sub controls the right channel and the other the left? I want to use these subs with a Martin Logan speaker.
russb
I use the high level connections(speakers). These seem to intergrated better then the low level(preamp out). They seem to be faster. The signal reaches your subs at the same time as they reach your speakers. With the low levels, it is just a little bit slower.
Like Raytheprinter asked you best need 2 preouts of your preamp 1 pair L+R go to the amp for main speakers, the other pair each L and R goes to each subwoofer's L and R inputs ( signals will sum up anyway ) or use y cables.
If you are going to use Rel - take a look at the following link for instruction on how to connect the REL.
http://www.sumikoaudio.net/rel/manuals/ST-Series-Manual.pdf