I don't beleve the 225 watts Dk AM with the battery at 2 watts drive is correct either. I beleve the 225 and the 480 are erroneous, I know the difference is volteg, I beleve 2 watts drive DK is vary high for that amp, The question to myself is why such high DK readings for a amp that spec's at 250 max AM, I just want to see what happens with modulation. Scott.