I have just purchased a used (obviously) rig - Sunn 1200s w/ Sunn 410h cab for $300.00. Good deal I thought. This is really a Fender product from the late 90s/early '00s. It really kicks though with only one 8 Ohms cab, its around 300w and not the 1200w it could put out at 2 ohms. Anyway, this amp has a rep for overheating and is fairly hard to fix given its age and no support from Fender. My question is how many of you bring a back up amp to gigs and if so, what do you bring for emergencies?