Your general opinion of this product.
I bought a PMP 518M in December of 2007.I smoked it by plugging & unpluging a speaker with it on. I never had an issue with it until then ! I use it to mic my drums and use 2x12 MCM Technical Pro poly cabinets with horns. The Smp power supply means it has no power transformer & cuts the weight by 6 lbs. I had to put some velcro on the bottom to keep it from walking off the top of the speaker. I am a retired electronics technician & if one or two the outputs shorts, It will peel foil on the output board. I have been looking @ this 300 watt for some time even before I killed mine. The PMP 518M is on sale for $99.00 so I ordered another of it also as a back up!It is heavier because of the transformer. The PMP530M is the newer unit. I can not tell any difference in the output volume from the 2, side by side. one is 180 watts and the newer one says 300 watts. Any way I like the newer one because of the lighter weight. They are throw away items after the warranty if the out puts go.