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General Asylum General audio topics that don't fit into specific categories. |
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General Asylum General audio topics that don't fit into specific categories. |
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In Reply to: Re: blowing woofers mechanically posted by MarkgM on August 26, 2003 at 19:02:41:
If I irritated you I apologize whether you deserved it or not.
Oops ... I just irritated you again.
I would like to irritate you for a third time by pointing out that
observing a speaker being damaged does not guarantee that one knows
exactly why it was damaged or how to prevent damage in the future ...
but if you guessed the cause was "too much power input" you'd almost always be right. True that too much power input can cause overexcursion damage before any voice coil overheating occurs.
This is especially a risk with ported speakers with high input at frequencies below the port tuning frequency.Woofer overexcursion damage is rare although overexcursion damage is a common problem for the "boombox car" guys -- that's why they often don't care about their driver's XMAX or DUMAX -- all they are interested in is XMECH = maximum excursion before overexcursion damage becomes likely.
Every woofer has an XMECH spec beyond which overexcursion damage is likely. The more powerful the amplifier, of course, the easier it will be to cause overexcursion damage. Clipping is not the cause although it is related in one way -- under conditions that cause a lot of clipping (compression of the complex A/C waveform also known as music) an amplifier's average power output will be roughly double the rated power output. Therefore, a speaker that can absorb 100 watts continuously could be damaged by a severely clipping amplifier rated at over 50wpc (producing over 100 watts continuous output).
If that was the Telarc 1812 overture with output under 10Hz.,
that is definitely one the best CDs for causing overexcursion
damage.Unless you are listening to sine waves the amp is not
"providing a sine wave".
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- Woofer overexcursion damage is rare -- besides the subject was tweeter damage - Richard BassNut Greene 08:33:43 08/27/03 (0)
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