If that were true, nobody could amplify synths or use a fuzzbox without constantly blowing speakers.
Jimmy I always find your posts both interesting and informative but I have to disagree with you on this one.
In the case of a synth or fuzzbox, you would be amplifying a preamp level signal of the "square wave" sound. That's entirely different from the output of the poweramp.
If the power output from the amp is clean (no clipping) your speaker is receiving the clean sine wave coming from the output of the amp "reproducing" the square wave sound from the synth or fuzzbox. That's a big difference from an amp whose output is clipping sending out a DC square wave to your speaker.
Clipping amps send out DC square waves from the output to the speaker. It's a fact and is talked about all over the web in various forums and documents. Below is one example of many out there.
The following quoted from Peavey's "The Weakest Link"
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"Please remember the loudspeaker must absorb the power output of the amplifier. Numerous factors combine to make the speakers task difficult. It should be remembered that cone type loudspeakers
.(even the best of them) are very inefficient. Most cone type loudspeakers are significantly less than 4% efficient
. Because of the law of conservation of energy, power applied to the speaker (that is not converted into sound) has to go somewhere
.usually as HEAT! Consider this, if the loudspeaker is 4% efficient, this means that only 4% of the power applied to the speaker is converted into sound, and the remaining 96% is dissipated as heat
This isnt a problem at 10,15, or 20 watts
At 100 watts or greater, it becomes an evermore serious problem as the power level increases. At 100 watts, 96 watts must be dissipated.
At 1,000 watts, this is 960 watts of heat that must go somewhere or remain within the voice coil, thus causing destructive heating effects! It is well known that most materials expand as heat builds up. This is true of metal, plastic, and most other materials. What isnt generally known is that, as that heat energy is absorbed by the speakers voice coil wire, its RESISTANCE tends to INCREASE, thus causing what some people call POWER COMPRESSION
. Simply put, as the heat rises, sodoes the DC resistance of the voice coil. This is one of the factors that contributes to musicians having to turn up their amps after 20 or 30 minutes of playing time. Of course, as power is further increased, so does the heat, and so does the power compression, thus the stage is set for loudspeaker failure.
While HEAT is the major destroyer of loudspeakers, the "waveform fed to the loudspeaker can also be problematic. Normal sinewave type clean program material is what a loudspeaker usually encounters,
but if the amplifier is allowed to clip (square off) then square waves are fed to the speaker, which are severely destructive in several ways. First of all, when an amplifier clips and delivers a square wave to the speaker, the portion of the waveform that is square represents DIRECT CURRENT (DC) which tends to heat up the voice coil very rapidly. As an additional negative, the G forces involved with the loudspeaker trying to follow a square wave are significant because the amp is telling the loudspeaker to move FULLY forward or backward (instantaneously) which of course is impossible for any device having mass and air resistance With a square wave input, the loudspeaker is subject to the two most destructive forces imaginable SIMULTANEOUSLY (i.e. maximum G forces that strain the structural elements of the speaker, such as the cone and its attachment points to the Spider and to the voice coil AND maximum heating caused by the square wave applying D.C. (for the majority of the time domain) to the voice coil causing maximum heating affects"
Not really trying to argue but rather point out that it's a well known fact that a clipping amp regardless of wattage is tossing a DC square wave to the speaker which can and does damage speakers.
I agree with you that with small wattage amps and good speakers this isn't a major issue. However as you can see in the quoted article, at anything over a 100 watts it begins to become an issue.
When shredhead68 asked about a further explanation of clipping with his PF-500, I mentioned the fact about heat buildup in case he wasn't familiar with what might happen if you crank up an amp till it clips.
Now my fingers are tired from all this typing. I'd better go exercise them with some bass thrashing
Keep Low
Those slave outputs are handy. Shipping back the warranty one already though 
Have fun playing...I should be getting to work, too.
