no, its like saying that if an amplifier needs only 2 volts of signal to give max unclipped power, then 5,6 or 8 volts is redundant, in some, not all applications. it all depends on how sensitive your amps are, you know, there feelings, how they feel about the anount of signal they get, haha, anyway some amps, eg, avi, alpine, concept, dont require as much signal as a phoenix gold, kicker or rockford, to get max unclipped output. i have read many times on this board that people say that the alpine h/u's have poor output on the subwoofer preout, i have never found this to be a problem myself, you can always saturate the input of most good amps without any problem, my point is though, you dont have to on some amps [img]graemlins/beer.gif[/img] , btw, hows the new job mike

 

I think the main complaint from those Alpine decks was that the subwoofer input clipped way before the other outputs clipped. Not that the voltage was too low. Anyways, I agree with Dave, once you get the voltage the amps need, anything else is really not usefull, and with most amps I have seen it is around 3 volts on the high end.

Also as far as output impedence goes, I got the impression at RTTI from Mark ***uda that it is only a usefull spec if you are running multiple amps off of one output.

 

***uda

 

Output impedance can also describe the effect that cable inductance and capacitance will have on the system, and as a result, the net frequency response of the system.

I have an Alpine at home to test for the magazine, but more often than not, the output impedance is indeed on the order of 300 Ohms or so.