Sebi said:
If the distortion generated in small signal stage, this is no dangerous for speaker.
Unless you turn it up loud :lol:
The reason for blowing the speaker is pretty straight forward, and just requires simple maths.
Assume your amplifier has an HT rail of 100V, so the maximum peak to peak output is 100V p-p. To convert this to RMS volts for a sinewave, you divide it by 2.828 giving 35.36V RMS. To calculate power you square this, and divide it by the speaker impedance - giving 156W into 8 ohms.
For a square wave, either clipped in the output stages, or clipped in the input stages and turned up to full level, the RMS voltage output is 100 divied by 2 - giving 50V RMS. The output power from this is 312W, double that for a sinewave.
So using a squarewave rather than a sinewave doubles the power in the speaker.
However, it's 'nicer' to clip in the preamp stages, rather than overdrive the
output stages massively - your amplifier will love you for it :lol: