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In the Forum: Audio Discussions
In the Thread: The leather-suspended drivers.
Post Subject: Leather suspension and the TonePosted by haralanov on: 6/15/2009
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In my view the leather as a suspension material is absolutely spectacular and this is because it's mechanical impedance is very close to that of the cone (of course made of fine paper) and there is no energy reflected from the surround back to the voice coil former causing standing waves in the driver's diaphragm...
It must be flat as a profile and maximally streched toward to driver's chassis. This technique does not allow Xmax more than 1-2mm, but the sound is really really wonderful.
Yesterday I listened to very old 12" Blaupunkt driver from 30's which has really amazing tonal qualities. When I tapped the paper with my finger and then the leather, there was almost no difference between the two sounds from these materials... Here is a close shot of the leather surround:
This is the driver:
Regards,
Haralanov
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