04-10-2003 06:21 PM
04-10-2003 06:24 PM
Originally posted by allan grossman
Here's my understanding of the problem - and agedhorse is welcome to correct me if there are huge holes in my logic
Audio power amps don't put out DC or anything close to it - even when clipping.
As the amp clips the top and bottom of the sine wave flatten out but it still doesn't get anywhere near DC. As clipping (and distortion) increases the amount of RMS power applied to the driver also increases. When you exceed the thermal limitations of the speaker the speaker fails - but it fails from being overpowered, not underpowered.
The shape of the wave isn't what causes the speaker to fail - it's the amount of power sent to the speaker.
If you have a 300w speaker it's not possible to cause thermal overload with a 30w amp. With a 250w amp that's clipping it may still be possible to exceed the thermal limits of our 300w speaker - but that's because you dumped more than 300w into the speaker - not because of the shape of the waveform.
Of course, mechanical damage is another thing.
04-10-2003 08:02 PM
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