That wouldn't be Transient InterModulation distortion, the '70s audiophile's favourite technobabble, would it? You sure have a funny understanding of the phrase 'tired and old'.Globs said:A great spec would involve double the power into 4ohm (300 W in this case) and a TIM measurement. The fact they do not offer that and pimp the tired, old and misleading THD is worrying.
And as for your nice demonstration at maths: are you implying that a speaker has a uniform impedance across its entire frequency range? Your audience already knows that is untrue, so who are you trying to fool here? I would also be interested in how you get your V/I figures, because for 150Wrms into 8ohm, I get roughly 40V and 5A. The 1500W figure is completely uninteresting because that's mains power draw and hence includes operating power and transformer losses.