I bought a Soundtech Digital Power amp to replace my SWR BAss 350 - which although beautiful sounding, had to work a little too hard to cut through. I really like the preamp of the SWR. Thing is I also use a PSA-1 overdrive preamp. The SWR doesn't have a preamp out as such, just a balanced out that can be set to either line or direct. Could I take the balanced out from the SWR into the PSA-1 and then on to my pwer amp. I know that the SWR can run without speakers plugged in no problem. This way I guess I also get to keep my SWR in my rig as a backup. Other than that, is the preamp section of the SWR available as a seperate preamp?