Loudspeaker DC Offset Analysis

opacheco · 14th October 2011, 03:20 PM

Hi,

I readed some very short about this here:

B&C SPEAKERS

But I would like to find something more specific(theorical analysis I mean!) for that....Do somebody know where I can find something like that???

Thanks
Opacheco.

simon7000 · 14th October 2011, 06:03 PM

DC offset is a real problem only in dynamic loudspeakers that have no suspension. That means no edge roll or spider.

opacheco · 14th October 2011, 06:09 PM

Quote:

Originally Posted by simon7000

DC offset is a real problem only in dynamic loudspeakers that have no suspension. That means no edge roll or spider.

What kind of Lousdpeaker are these???

Opacheco.

simon7000 · 14th October 2011, 08:39 PM

Quote:

Originally Posted by opacheco

What kind of Lousdpeaker are these???

Opacheco.

Non existent!

VaNarn · 15th October 2011, 01:14 AM

The effect is also called "oil canning".The usual cure for the problem, which is in part caused by long throw coils, is to employ a suspension that progressively stiffens in proportion to the movement.The offset is created when a coil is driven out of the confines of the magnet gap,i.e into a weak field and a back emf is created when the coil seeks to return to its central position.

14th October 2011, 03:20 PM	#1
opacheco diyAudio Member Join Date: Jan 2004 Location: Honduras Central America	Loudspeaker DC Offset Analysis Hi, I readed some very short about this here: B&C SPEAKERS But I would like to find something more specific(theorical analysis I mean!) for that....Do somebody know where I can find something like that??? Thanks Opacheco.

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14th October 2011, 06:03 PM	#2
simon7000 diyAudio Member Join Date: Nov 2008 Location: Oakmont PA	DC offset is a real problem only in dynamic loudspeakers that have no suspension. That means no edge roll or spider.

15th October 2011, 01:14 AM	#5
VaNarn diyAudio Member Join Date: Dec 2010 Location: Ivanhoe	The effect is also called "oil canning".The usual cure for the problem, which is in part caused by long throw coils, is to employ a suspension that progressively stiffens in proportion to the movement.The offset is created when a coil is driven out of the confines of the magnet gap,i.e into a weak field and a back emf is created when the coil seeks to return to its central position.

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