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#393367 - 05/23/13 04:28 PM Dust caps and driver shape
tomtuttle Offline
axiomite

Registered: 06/20/03
Posts: 8288
Loc: Tacoma
Andrew's FB post today about "new subwoofer drivers" (complete with pictures) rekindled my interest in the functional and aesthetic differences between convex and concave dust caps.



The product pages seem to indicate that the EP500 now has a convex dust cap.

I really like the look of the single aluminum cone drivers on the EP600/800, the Rythmik subs and some other manufacturers. I like the idea of my dust caps not being dented.

So, since you guys probably read AVS or can Google better than I can or are actual audio professionals...

Is it cheaper (or better) to manufacture drivers with a convex dust cap rather than drivers with a single cone or a concave dust cap? Does it improve the radiation pattern? Does the effect vary by frequency?
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#393368 - 05/23/13 04:30 PM Re: Dust caps and driver shape [Re: tomtuttle]
Ken.C Offline
shareholder in the making

Registered: 05/03/03
Posts: 17775
Loc: NoVA
I've seen varying pics of Axiom's current sub drivers. A lot of them seem to be shopped, but I think the current EP350s have convex covers. My EP350, which is pretty current, has a convex cover.

I have nothing helpful to say and I'm half asleep. bduh bduh bduh.
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#393373 - 05/23/13 10:27 PM Re: Dust caps and driver shape [Re: tomtuttle]
dakkon Offline
connoisseur

Registered: 02/08/04
Posts: 1846
FB post? i looked at axioms fb page and didnt see anything??

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#393375 - 05/23/13 11:35 PM Re: Dust caps and driver shape [Re: tomtuttle]
JohnK Offline
shareholder in the making

Registered: 05/11/02
Posts: 10388
Tom, the EP500 pictures seem to be mostly still the concave cone without dust-cap. One shows a dust-cap.

The stuff I've read(not much)on this topic discusses high frequency extension and dispersion. This would seem to be a moot point for subs which have essentially omni-directional dispersion.
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#393378 - 05/24/13 07:13 AM Re: Dust caps and driver shape [Re: tomtuttle]
MarkSJohnson Offline
shareholder in the making

Registered: 09/27/04
Posts: 10886
Loc: Central NH
You guys are waiting for me to vote on the ones that more resemble boobies, right?
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#393401 - 05/25/13 11:54 AM Re: Dust caps and driver shape [Re: tomtuttle]
brwsaw Offline
connoisseur

Registered: 10/12/12
Posts: 1033
Is it me or is posting pictures and no other details a bit of a tease?
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#393402 - 05/25/13 12:02 PM Re: Dust caps and driver shape [Re: tomtuttle]
Ken.C Offline
shareholder in the making

Registered: 05/03/03
Posts: 17775
Loc: NoVA
Well... yes.....
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#393405 - 05/25/13 01:31 PM Re: Dust caps and driver shape [Re: tomtuttle]
Adrian Offline
axiomite

Registered: 12/27/08
Posts: 6609
Loc: It's all about the location.
I kind of prefer the insee vs the outee as far as appearance goes but I'd choose one over the other if it was better from a sonic perspective.
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