In a different thread, someone had made the comment that the SWR SM-900 is supposed to get hot. It is, I understand that part, but how hot is it supposed to get? After about an hour of running the amp through a 4 ohm 2x15 in bridged mode, the front rack handle is not just 'hot' but more like 'if I ABSOLUTELY HAD TO hold the amplifier by these two handles on the face of the amp I would not be able to because my fingers would be fried right through' kind of hot. It's caused some problems, and it's shut down during shows, and it's blown output fuses. I realize my particular amp is what could affectionately be called a 'lemon' but I prefer 'dud,' but I think there's a few certain design flaws which exacerbate the 'running hot' problem. The vent in the back is a decent sized vent, but it's just an opening in the case to passively draw air in. The fan inside blows across the heat sink and hot air would exit via a vent hole cut in the side of the chassis. (the right side, as you're looking at the back). The fan is only blowing air that is already inside the chassis across the heat sink towards a small vent on the side. Does anyone find this to be a not all that bright design? First of all, the amp is sucking a lot of juice, it's going to be getting hot, so use passive air induction? (there is not a fan to force air in or out of the unit, it just wafts in) Secondly, and most not brightly... the amp is designed to be put in a rack case. (Hence the rack ears built as a part of the faceplate of the amp) Now why have the exhaust exit the side of the unit, where the wall of the rack case is 1/4" to 1/2" away? Not only does it not really allow for heat to exit the amplifier chassis, but the hot air also stays inside the rack case to be drawn into the passive air induction vent hole again! My amp has had most of it's QC issues taken care of during it's warranty period (it's only been in for service 7 times since 2001 ) but the cooling issue is an inherent design flaw, not really covered under warranty. And besides, the amp is "supposed to run hot." To rectify this problem (the amp shutting down in the middle of a set is a big problem) the SWR repair guy modified the fan to run at a low setting all the time, and kick into a higher gear when it reached the point that the fan would normally turn on. I also mounted a 3" or 4" computer fan on the top rail of the rack case to actually remove the hot air from inside the rack case so it doesn't go right back into the amp and heat up more. Since those two things were done the amp has neither gone into thermal shut down nor blown a fuse. Which is another issue in and of itself... Here's the question- While these look like simple common sense issues, and while component design has much to do with the layout- are other "top notch" amplifiers designed this poorly, or am I cursing at the engineers who designed it unfairly?