Talk:Voice coil
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the cone has been known to tear off the cone????
[edit] Voltage and current in loudspeaker coils
The cone force (equivalent to cone displacement with a linear compliance) is proportional to the current. The induced (terminal) emf is proportional to the coil velocity. See Lenz law and Flemings rules.--Light current 17:39, 26 February 2006 (UTC)
- I'd have said "eventual cone displacement" (to indicate that that would be the static end point rather than the dynamic situation) and "counter EMF", but otherwise, this is correct.
- Atlant 19:59, 26 February 2006 (UTC)
Yes, but if you drive a coil with a sinusoidal lowish frequency current, is not the cone displacement proportional to that instantaneous current? (assuming a linear compliance of the surround) --Light current 20:54, 26 February 2006 (UTC)
[edit] Thumping noise
Does anyone know what this highly scientific term means and what causes it?--Light current 21:19, 4 March 2006 (UTC)
- Are you referring to how speakers sometimes "thump" upon power-up (of the amp)?
- Atlant 02:29, 5 March 2006 (UTC)
Probably thats what the author meant (an effect due to excessive current).--Light current 02:33, 5 March 2006 (UTC)
