I use two K2's in my band, one for mids/highs one for subs. I've found at moderately loud full band volumes the amps get fairly hot to the touch on the top towards the front. Not so hot it would burn your hand, but hot enough that it would make you think twice, more than just warm. That's after a 4 hour show, no fan or anything on it, maybe 2 rack spaces between the amps. Based on this unscientific info, something sounds odd about your scenario, I wouldn't think they would be THAT hot. There also shouldn't be anything rattling around inside. Hope that helps.