This maybe a silly question. I have a TCE BG250 with 1/15. Love the combo. I purchased it for jams originally but now will need to move a bit more air for live performance. I've read some threads where folks will stack two combos for this. Makes sense cost wise with the benefit of having a back up amp if on fails. Here's the question. Can I stack two combo's as above, maybe another 1/15 or 2/10 and have a good sound with double the air/ amp supply. Or Go with a traditional one amp plus speakers set up requiring a possible back up amp? Any suggestions?