It doesn't mix too well. My subs were taking a beating with it, but they weren't gettin' warm at all, so they should be fine. The inline fuse holder didn't make it. The 4guage should survive. It just melted the inline fuse holder. //content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif I didn't blow any fuses, but the plastic just didn't stand the heat. I wouldn't guess that the cheap fuse holder was going to make it at all, it's a Phonics Digital brand fuse holder. It took it for a good minute or so though. I didn't get a chance to measure the volts it was drawing. I didn't think these amps were 1 ohm stable. I guess I'm going to have to save up for some better subs and another P500.2.