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Speaker Asylum General speaker questions for audio and home theater. |
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Speaker Asylum General speaker questions for audio and home theater. |
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In Reply to: Clipping posted by kal1971@juno.com on May 9, 2011 at 14:54:03:
Most speakers that are damaged by clipping are casualties of the increased average power during the un-cipped portion of the music, the clipping per se doesn't damage them.Of course the old myths about clipping damaging speakers have been repeated for so long than most people believe them.
What is really interesting is the so called 'soft clip' circuit that NAD uses in many of their amplifiers. If you look at the schematic you will find that it is a hard diode clipper on the input of the amplifier. If you look at the output on a 'scope you will not see any difference in the clipping behavior with the 'soft clipping' switched on or off. Yet the circuit does reduce damage to the speakers (but explaining why would take some time).
What I used to do was install an inline fuse holder on the 'hot' speaker lead. The fuse was a fast blow (AGC or 3AG) type, the value calculated to pass rated power less 6dB into the impedance the speaker is. Normal program material has a very high peak-to-average ratio, so this fuse size allows for clipping to occur and would open up when the average power out got to 25% (-6dB) of rated power.
This band-aid fix reduced having to replace 90% of the failures I would normally see. Later on I started adding 211-2 automotive light bulbs to the tweeters, and found that this worked even better.
Edits: 05/10/11 05/10/11
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Follow Ups
- The Myth ? - djk 16:23:57 05/09/11 (3)
- RE: The Myth ? - goblin141 09:31:44 05/10/11 (2)
- RE: The Myth ? - djk 03:24:29 05/11/11 (1)
- Their fine - goblin141 09:04:56 05/11/11 (0)
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