I'm asking because I was looking at the RMX line of QSC Amps. I've had a PLX, but the RMX is quite impressive for the price. Will the naked ear hear the difference in sound with a Damping factor of 300 as compared to the PLX line which has a damping factor of 500?? Just what is this spec anyway?? I've always understood it to be the amps ability to control cone movement. A higher number (like in the 500's) has been considered pretty top notch. But the lower numbers (in the 300 range) are less than optimal, and associated with poorer quality. I'm not at all saying the the QSC RMX's are not good quality, but there is a difference. So what is it?? My own tests found a noticeable difference in a Mackie 1400 (Damping Factor = 350) and a Stew 2.1 (damping factor >500) The Stew sounded tighter, crisper, more defined. Were my ears deceiving me??