Alright, So I have a gig this saturday and I want to use my rockerverb 50 head (because they sound like pure sex) but my Cab has NOT ARRIVED and will not arrive until next week. I noticed on my old amp (line 6 spider VALVE), the speaker output can be disconnected (it is an 8ohm). I know that the orange cab has the exact same speakers and resistance (ohms) as the spider valve (8ohm connection w/ celestion vintage 30's). So could I merely hook up the speaker output cable from the line 6 spider valve speaker to the speaker input in the rockerverb 50?
You should be able to. I probably won't sound as good as an Orange cab, but it'll get you by.