But if mains power is somehow in electric contact with the input signal, or if the power
output of the amplifier is in electric contact with the input BNC, then this will damage
the amplfier.
For the sound source, or shaker, or other load, which is driven by the amplifier an
external signal can be harmfull depending on the type of source and type of signal. For
example because it contains power outside the normal frequency range of the sound
source, or because it cannot withstand the high power, or because all energy is
concentrated at one frequency, etc.
Why is distortion of the internally generated random noise signals normal?
The random noises from the signal can "sound" discontinuous,stuttering,distorted. We do
crest factor optimization on noise signals, which makes the random noise "sound"
different from normal high crest factor white- or pink random noise. This can seem to be
distortion, and is especially noticeable with pink noise on any level. This may sound like a
cough, or stuttering. It is a side effect of what we do with random noise to get a
maximum output level from the source and amplifier. It is normal, and not harmful. This is
not the same as distortion, because the actual distortion is very low. The TDH is below
0.1 % up to 50% of maximum power on input signal below 0.35V sspk.
Audible distortion on external signals, only in the case when the overload LED is
activated, it indicates that the maxiumum level of linear operation on this external signal
is exceeded.
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