:scowl: A pox on your children, Hartke! For about 3 years now I've been running a Hartke 4000 head through the 410xl cab (8 ohm). I've never had to crank it past 6 or so, but couldn't have it under 4-5 either (I wish I had gotten a 4-ohm instead). The clip light used to blink fairly regularly, which I took as it simply being over-sensitive. Just recently, I started hearing random pops coming from the speakers, with just the head running through and no bass connected. Then, the sound simply died out (as if a guitar battery was low or something) and the clip light was fully lit. Obviously there's now a problem with the head, but I wonder if it had anything to do with the cab...could the amp have gotten overworked from powering that cab? Any help on this would be greatly appreciated; I'd rather hear from the real experts than some tool at the guitar store.