Yesterday I received a Carvin DCM1000 power amp that I bought off eBay. It's in perfect condition. I have an early 90's Groove Tubes "Studio Series Tube Preamp for Bass" that has an electrical outlet on the back above the power input, so I just plugged the Carvin into that like I'd been doing with my other power amp. I hadn't looked at the manual. I played a 2 1/2 hour gig and everything worked well, even when I tried putting it up to full power at its minimum impedance bridged, but I looked at the manual afterwards and saw this: "Power Requirements: 120VAC 25 amp circuit minimum." The power outlet on the preamp is only 9 amps. What kind of trouble can I run into with this set up?