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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: No. I am saying that the most common cause of damage to posted by bwkendall on August 25, 2003 at 13:35:34:
bwkendall:
This is not intended as an insult.
You may be a very intelligent person in general ...
but just not on the subject of speakers and amplifier clipping:There are many beliefs about audio that are wrong.
Clipping as an extremely dangerous speaker killer is one myth.
Of course there is a little truth behind this myth -- clipping harmonics are not completely harmless to tweeters."Underpowered amps" are dangerous to tweeters,
but other amplifiers are safe, is another urban myth.Do some research and learn more about speakers and clipping.
I offer one link that describes how clipping may limit the SPL of some bass transient voltages, but if one keeps turning the volume control clockwise, the treble keeps getting louder until the tweeter is damaged. To blame clipping for too much volume is to ignore the primary (90-95%) cause of speaker damage -- the person who last touched the volume control.But even if you were right about "underpowered amplifiers",
I challenge you to make a definitive "ruling" on whether or not a 70wpc receiver is "underpowered" relative to ADS 420 speakers rated
for 50 watts rms.I make this challenge because 99% of the time the (95% incorrect) advice "your amplifier was underpowered" comes AFTER a speaker is damaged.
Advice too late to do any good.
Note that the paper at the Rane Corp link is from a pro speaker point of view -- the test tone used to calculate clipping harmonics (100Hz. square wave) would represent a heavily clipped 100 Hz. sine wave test tone and the 1,000Hz. crossover frequency to the tweeter is at least an octave lower than crossovers in home speakers
The typical intermittent clipping of real music and 2,000Hz. or higher crossover frequencies for home speakers would be much less damaging to tweeters ... and yet the Rane Corp engineer calculated only 1.4 watts clipping harmonics from their worst case analysis
with a 1000Hz. crossover frequency to the tweeter.
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Follow Ups
- I know exactly what you're saying, but that is not correct - Richard BassNut Greene 13:59:37 08/25/03 (1)
- No offense taken at all. - bwkendall 14:31:07 08/25/03 (0)
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