I've got a line on a screaming deal on a Soldano SP77.  If I don't like I can eBay for more than the asking price.  Only this is I don't want to buy a power amp to go with it until I've had a chance to play the SP77 for  a while to decide if I like it.  
Here's the question: If I run the SP77 into the effects return of a regular head, that's the same as using the power stage of the head with the SP77 as a pre, right? Is there any reason why that wouldn't work? Do people do that?
				
			Here's the question: If I run the SP77 into the effects return of a regular head, that's the same as using the power stage of the head with the SP77 as a pre, right? Is there any reason why that wouldn't work? Do people do that?