Firstly let me preface this by mentioning that the reason I'm posting this thread is because I'm looking at getting an amp that does 500w into 2 ohms (and of course lower wattages for higher impedances, presumably about 300w into 4 ohms and so on). I have a Flite Sound cab (the 110MHD), which has three drivers: 10" Eminence Beta (8 ohms, 250w RMS) 5" Pioneer cone midrange (8 ohms, 50w RMS) 4" Pyle Pro horn tweeter horn (4-8 ohms, 200w) The cab has attenuators for the tweeter and horn (which I pretty much always run full out anyway). I measured the resistance at the jack terminals, and my multimeter stabilises at 6.3 ohms, it doesn't seem to matter how the attenuators are set. Interesting as the cab is rated at 8 ohms... is it common for ratings to be "approximated" this way? I'm also wondering how this figure is arrived at... parallel wiring of three speakers (at 8 ohms each) would give 2.67 ohms (or 2 ohms if the mid-range is 4 ohms, the opposite end of the rating range). Any input would be appreciated, as I would love to rewire the cab to a lower overall impedance to take advantage of the amp's power output. I am aware that I'd probably need to be careful with the 50w midrange driver... but even rewiring the tweeter and woofer in parallel might be good enough, eliminating the midrange driver altogether, etc.