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68.103.3.192
In Reply to: RE: Dynaudio's "blown"? posted by freaknhell on October 18, 2009 at 14:06:09
You did indeed. That buzzing is likely a voice coil rubbing along the magnet gap, caused by distorted-in-shape coil former due to the over-driven speaker. Running your cars' engine past its' Redline can blow its' motor too.
I did this for only a few seconds. Maybe 10 or twenty. Also, just referred to the user manual and it states... "The left indicator is a true clip indicator and lights when the low frequency amplifier clips. It is acceptable to run the system with this lighting occasionally but avoid running the system with the lighting most of the time".
Same with car engines, sometines you can get away with it & other times you cannot. Also depends on prior use/stress as to when/if that straw breaks the camels' back. If they have foam cone surround suspension, that may be the problem. Removng the grills & gently pushing inwards on cones will discover which is the culpret.
If the light goes on indicating that the signal is "clipping," I can see where damage can occur to your speakers, even if it's a brief moment. This damage may occur when the clipped source causes the speaker VC to "freeze" for a moment (where the peaks of the sine wave is chopped off). This may cause mis-alignment or thermal damage to the VC (or both). Anyhow, seen this happen when ppl put hi-fi speakers into guitar amp cabinets. I think the tighter tolerances of hi-fi speakers makes them more succeptible to damage from clipping.
When I take a guitar-amp designed speaker apart, they tend to have bigger gaps between the VC and the permanent magnet. I think this makes the speaker able to work even after heavy abuse from a clipping amp. Just a WAG...
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