I have a solid state Marshall 30w and I want to use it as a pre amp and funnel it into a Laney Pro-Linebacker 100R http://www.laney.co.uk/prod_archive.php. Is there anyway to accomplish such as thing?

The Marshall has a headphone out and a "CD" (aux) input. I'd like to be able to use the Marshall just for tone and push it out through the Laney in all of it's crappy 100 watts of glory. Seriously, I like the gain channel on the Marshall even though its a cheap one.

Am I going to have to build a new output for the Marshall directly after the pre-stage? and then somehow plug it into the power stage of the laney? Has anyone done this? As much as I'd like to buy a new amplifier I really can't and I'd just like to have a louder version of the Marshall anyway, so...

Can anybody help me out on this one? I don't mind having a franken-amp, I just want a loud amp that sound decent.