Smell it while running it free air if the coils check out.
I have a sub that reads just fine, but the coils smell slightly. Maybe I shouldn't have put about 1kW of DC power to it and walked away for a minute or two.
It's weird, the one I was talking about stinks, but it still takes the power like normal. I just accidentally cooked it with DC. //content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif Any possible explanation?