Could I run a power amp or an amp head into my combo and use the combo speaker as a "cabinet" of sorts? There's a "power amp in" jack which made me consider this. Am I out to lunch or could this work? relavent specs: I own a Fender BXR-100. It's a 100 watt amp with a 15" speaker in it. I can't find any other specs than on this page (Fender has no info. on it, I'm guessing it's a discontinued line). The amp head I was thinking of buying is the GK Backline 600, which is a 300watt amp @ 4ohms. I'm kindof an Amp newb so bear with me. I've read through a ton of the FAQs here about amps and all things amp-related and haven't seen anything regarding this kind of set up yet. I've seen people meantioning using combos as a pre-amp (my BXR also has a "Preamp Out" jack) but not going this route. That may be because what I have in mind is not possible.