While all of you have stated ohms law correctly, I do not believe that amp is capable of over 8000 watts even on 17 volts. You said 107 volts at 1.3 ohms and you used that to figure your current, but the problem is the impedence changes depending on the enclosure frequency, heat, etc...so while it may have been wired at 1.3 on 17 volts and put out 107 volts, your real impedence could have been 4-5 ohms. To really test your power you need a AC clamp meter and a voltmeter. Check the voltage output on a burp while simultaneously checking the current output at the same time. Multiply these two numbers together and you'll have your real power or as close as you can get to it without some more expensive equipment. 3500-4000 watts at 17 volts would be more realistic depending upon the power supply in the amp. If you figure your impedence rise was to 3 ohms even, you'd have about 35.6 amps and 107 volts which is 3816 watts. Much more realistic.