damping the driver magnet

[PreSapian]

hello i've been checking out what few threads i could find on basket damping however none so far includes any elaboration of the theory. i'd like to know how 'extreme' i could take the process to before it becomes harmful. currently i'm listening to a pair of tangband w4 1337 that i damped the magnets of with a layer of vinyl sound dampening sheet and an inch foam attached to the backs of them. tangband's baskets have grooves molded into the legs- should i fill them up also? i will be using the drivers in a dipole design- jim holtz's statements to be exact.

[tinitus]

Just be careful not to block the air flow behind the driver, or make it any less than it is
Just smoothe out the sharp edges
And I wouldnt use plastic stuff that could get statically loaded, but thats just me
Soft clay stuff that doesnt dry out has always been a good material

Actually I never thought about it, but those metal shielding cap used on many drivers may actually ring like a bell
Pretty awful to think of

[PreSapian]

the 'vinyl' sheet is actually a rubber/silica composite and doesn't act anywhere as flexible as the product pics from PE might i add. static isn't a problem with this material. well recommended imho.

[alan-1-b]

Originally Posted by tinitus

And I wouldnt use plastic stuff that could get statically loaded, but thats just me


Actually I never thought about it, but those metal shielding cap used on many drivers may actually ring like a bell
Pretty awful to think of

Hey tinitus,

where do you find these ideas ?
You are certainly a discerning listener !
I do not use materials which can carry high Static charge of the opposite Polarity to other materials inside an enclosure.
Research "Triboelectric" for static characteristics of various materials.

Metal sheilding caps - well the one over the back of the magnet in my KEF iQ3 is open hollow behind the cone's back radiation, and I reckon some reflections and resonance will occur in there, but I'm not going to install plastic foam there as the inevitable heat from the magnet when driver is used will cause deterioration of the foam over time.
I may install something that has close to the same triboelectric characteristic as the plastic rear of the cone.

[PreSapian]

how thick of a foam can i attach behind the magnet? can it be of same thickness as the magnet? thats how mine is right now and it looks a bit of an overkill.. but naturally thats only my guess xP