Yeah i guess i shouldn't have used the word "distortion" its no longer a sine wave balh balh but yeah your right . If not enough power would blow subs, they would blow every time you turn it down I read somewhere that when your clipping its like sending twice the power to the speaker. But if the speaker can take twice the power and still be ok it won't be a problem ie clipping a 100 watt amp to a 200 watt speaker youll still be ok. If hes running 8 ohms then isn't that only like 65 watts to BOTH speakers or 32 watts each? That seems like the subs are severly underpowered. As you go pass the rated power the thd goes up very quickly and eventually its enough to begin to hear it. When it hits on the back plate isn't it more of a "whack" sound thats what happenens? When i bottomed out my rf sub it was a really loud "crack". He says its more of a helicopter sound but hard to tell without actaully hearing it.