You can use the speaker in the combo to connect to a head. As long as there ohm's match and the wattage of the speaker is higher then the output of the amp.
Oh.. I dont know if it will work, then. Because I'm gonna usa a Roland Cube 30 as a (temporary!) cab for a Mesa Boogie DC 5.

So this wont work at all?

EDIT: Sorry, mod! Your post wasn't there when I posted.
Last edited by gogosega at Jul 9, 2009,
the speaker in the cube is 4ohm iirc.
i used to be a mod, then i took an arrow in the knee.
^ No, the Roland Cube 30 does not have a detachable speaker as far as I know, unless you want to do some sort of wiring job.
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