Originally Posted by [DANGERDAN]
The lower down the frequency range the more power is required but not so much more power its more better quality power faster harder cleaner power...
More power is needed at lower frequencies maybe because there's simply more harmonics there. There's very little above a few khz for example.
I am going to ignore faster and harder power as I can't quantify that.
Cleaner power just means you are not distorting, IMO. And many amps have very little distortion when operated within their limits (often below .01% THD.)
You have a amp which has a nominal impedance of 8 and the amp has just enough volts to provide that resistance level, and the current being pushed into that resistance is enough for the speaker it would perhaps run.
You are correct that all amps, at some point, will clip. Either the amplifier will hit the nominal supply voltage and clip, or the supply voltage will sag under load...same problem...clipping. All amps will clip if you push them too hard. All amps won't clip if you don't push them too hard. All other distortion is either noise, or minimal harmonic distortion due to amp imperfection.
But say that speaker was requiring more power due to the difficulty of the sound its producing and lets just say the amp has twice the watts the speaker would ever need so what would be the problem, well its not because the amp doesn't have enough watts its because it cant get the power it requires fast enough.
Not sure what you mean by difficulty of sound. Higher frequencies do require a higher slew rate, but in general, we would expect any competent receiver or amp to have sufficient slew rate to avoid distortion from that source.
Amp don't really have a bunch of watts sitting around. What they have is a power supply that provides a fairly stable voltage (there would usually be some ripple.)
If you overdrive your amp due to too high of a volume, a few scenarios could occur which which result in distortion from clipping. It's not that you ran out of watts. You either exceeded your nominal supply voltage, your supply voltage sagged under load, or your amp/receiver's limiter circuits starting limiting supply voltage to protect itself - all three result in clipping.
An impedance dip could result in a problem if the signal in conjunction with the speaker's response instantaneously presented an low impedance to the amp. It might clip for that short period of time, or it might simply shut down. Is this a realistic scenario which happens a lot? I have my doubts.