high roll surround - like tc uses and the rlp

[Kyle_Keating 10+ year member]

Tapered thickness surround for high ... - Google Patent Search

 

[brian84corvette 10+ year member]

I got a hold of pierce and they sold me a 18" cone with tall foam multi layer surround.

not rubber

but also less prone to cracking

so

ill post up pictures of it when it arrives.

price was 39$ for cone w surround and 14 to ship. not bad

 

[brian84corvette 10+ year member]

here r pap cone pix

 

[SPLaudio 5,000+ posts]

cone material looks really thin for a 18" whats the thickness?

 

[CHEMMINS 10+ year member]

How long did it take them to get back to ya, I sent em an email, waiting to hear back.

 

[Lil Poot 5,000+ posts]

looks like the same material as my hdc3 cones

 

[hispls 5,000+ posts]

PAP tall surrounds are foam FYI

 

[hispls 5,000+ posts]

How long did it take them to get back to ya, I sent em an email, waiting to hear back.

I signed up to their forum and posted there. John got back to me in a day or so. Definitely good people to deal with.

 

[CHEMMINS 10+ year member]

Foam last longer than rubber supposedly. Hard to say which is actually stronger. Depends on the type of foam and rubber really.

 

[CHEMMINS 10+ year member]

I signed up to their forum and posted there. John got back to me in a day or so. Definitely good people to deal with.

May have to try that....thanks

 

[Kyle_Keating 10+ year member]

Foam last longer than rubber supposedly. Hard to say which is actually stronger. Depends on the type of foam and rubber really.

Other way around, strength is irreverent becaues you can increase thickness or durometer of either. Rubber is much more durable - Foam genearlly falls apart in about 10 years give or take, but its also susceptibility to UV damage, water damage and if its not soft enough it will just plain tear after enough use. There are generally two different kinds of foam used for surrounds, one is better against UV and the other is better against cracking, but rubber is better than both at both. The advantage of foam is its just plain lighter, so you'll get about a 1dB or so better sensitivity switch out the material so you're get better performance with foam.

 

[CHEMMINS 10+ year member]

Rubber dries out and cracks in less than 10 years....hence why they say not to run tires over 6 years old from date of manufacture....apples to oranges. Rubber is succeptable to UV as well. And I do believe that the foam is actually a rubberized foam, to get the best characteristics of both.

 

[Burton6431 10+ year member]

the rockford T1s and 2s use this type of surround and they make theirs outta foam, my friend has a t1 15" and his has a few scuffs so thats another characteristic, if something rubs against a rubber surround it may only leave a visual mark or blemish but some times if the foam is ruffed up or scraped it can feather or tear the surround, what i mean by feather is taking the smooth foam and making it feel rough and scratchy.

 

[Burton6431 10+ year member]

btw a link to the new 18 by robot, 18" B&W Bowers & Wilkins hybrid by Robot Underground - eBay (item 220666736395 end time Oct-08-10 19:35:01 PDT)

 

[Kyle_Keating 10+ year member]

Rubber dries out and cracks in less than 10 years....hence why they say not to run tires over 6 years old from date of manufacture....apples to oranges. Rubber is succeptable to UV as well. And I do believe that the foam is actually a rubberized foam, to get the best characteristics of both.

I'm also positive no woofers in production use rubberized foam. The foam you see on the woofers around here are all the same stuff, probably polyurethane. Its less durable than rubber under sunlight, but yet, evtaully the sun will wear out everything if you want to think of it like that. Rubberized foam is a very specialized and expensive material that i believe only Bridgestone makes or Dupont. Either way, it has some issues with forming I believe which makes its hard to work with (not positive on that)