one woofer is shiney and one is dull . . .

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Feyz said:
high sensitivity woofer with a lot of breakup ringgiiiiinggg

Indded he should recoat the woofers. The coating is there to help kill cone resonances.

For the phase plugs, if it is possible try to make phase plugs out of aluminum or copper or other nonmagnetic conductive material.

Unless designed as part of the motot metal phase plugs will have little effect -- might as well build them out of wood.

dave
 
I think I'm done . . .

I coated the woofers with Mod Podge Gloss. I wanted to put matte on it cause I don't like glossy things, but I can't remember ever seeing a woofer finsihed with matte or flat finish. I figured that the gloss finish is stronger and/or more durable than the matte.

I used 4 cm brush for first coat but noticed it left brush marks, so a blotted the second coat on with a 7 mm diameter round art paint brush. It left a nice textured finish, I think.

I made a 35 mm diameter phase plug out of white oak I believe. It is 76 mm long. About 25 mm is in the gap and 51 mm sticks out past the woofer, is this too much? Should I apply another coat of Mod Podge?

Also, I got some duct seal, but I don't know if it's necessary to put it on these woofer. What you think?
 

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The phase plug seems too long to me, comparing to what I have seen on similar woofers. I would have removed at least 2.5cm from the length of the phase plug, make it look something like this:
http://www.lautsprechershop.de/hifi/images/w21e002-4.jpg
Other than that, it looks cool.

It is hard to tell anything about the right amount of coating witout measuring the frequency response of the driver. Too much coating may kill the sensitivity by adding too much weight to it.
 
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