View Full Version : Tacky/Sticky Woofer?
08-17-2009, 05:31 PM
Out of curiosity, how come the woofers on the M5jr+'s have a tacky/sticky feel to them?
Is there any benefit from this or by chance a trend of some sort? At first, I thought that the previous owner had done something, but after seeing this come up at a few other places I came to the conclusion that it must have been applied during production.
08-17-2009, 05:34 PM
I'm not sure why they have the tacky texture, it is normal though. It's just a result of the treatment that was found to work best on the paper cones I'd imagine.
08-17-2009, 05:59 PM
Thanks for the response. I'm glad that it isn't a defect.
08-17-2009, 06:02 PM
No, be rest assured that it is not a defect.
08-17-2009, 06:10 PM
It's called a doped paper cone offering an improved performance over plain paper cones. Many, including myself, believe that doped paper cones are still the best, presenting a natural tone/sound.
08-17-2009, 06:15 PM
I agree, this is one of the better sounding budget speakers I have ever heard.
Are doped paper cones still used today?
I believe so: http://www.madisound.com/catalog/product_info.php?cPath=45_228_256&products_id=789
08-17-2009, 06:24 PM
Damn those look awfully close to the real deal
08-17-2009, 06:48 PM
I've seen quite a few car subwoofers that have the same type of texture on the cones. So, it is still used today. They definitely have a very natural sounding tone...I love the way these vintage Polk's sound.:D
08-17-2009, 06:55 PM
Danny Ritchie is still using doped paper on his designs. They aren't tacky, but the same basic idea.
08-18-2009, 01:36 AM
Yeah, they are still around. Also, seems that the DIY crowd likes to dope their plain paper drivers.
08-18-2009, 08:38 AM
Zig-Zag cone drivers.
A while ago...I asked about coatings for speaker cones on the PE forum and got some advice from some "hardcore" DIY speaker builders. I never bothered to mess with the Advents anyway, I just bought some Monitor 10s for outdoor duties. Gotta love butyl surrounds when you have better things to do than re-foaming old woofers !!:)
Zig-Zag cone drivers.
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