Polk Audio Tweeter foam. Anyone know where for find this?
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VSAT88
Posts: 1,381
Polk RTi150's, RD615-1 Made 7-20-2002. Anyone know where to get new foam for behind the diaphragms? Reproductions would be better than none at all. These as you see have disintegrated. Thanks!
Comments
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Try a felt dot.
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Is that pole piece just dished or is it vented all the way out the back?
Looks like a layer of gray underneath.......maybe closed cell, with a coin/disc/dome of black open cell on top?George / NJ
Polk 7B main speakers, std. mods+ (1979, orig owner)
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iFi nano iDSD DAC
iPurifier3
iDefender w/ iPower PS
Custom Steve Wilson 1m UPOCC Interconnect
iFi Mercury 0.5m OFHC continuous cast copper USB cable
Custom Ribbon Speaker Cables, 5ft long, 4N Copper, 14awg, ultra low inductance
Custom Vibration Isolation Speaker Stands and Sub Platform -
Actually there is an open hole behind it. Nothing in it. These are the RD6515's that came out of a set of RTi150's that had both tweeters V.C. blown when I bought them. I replaced them with SL6506. Supposedly a Tri-Laminate 6 ohm. I have no problem with the sound. I just know that those are starting to disintegrate as well because I took them apart and changed out the ferrofluid. Not quite as bad as these but it needs to be replaced. I think @pitdogg2 has the right idea. I think that would work. Also thought of simply stuffing some lambs wool in the hole. Only question I have now is if the foam was supposed to touch the back side of the diaphragm. On the JBL 035Ti I restored it is. It supposedly cuts back on ringing/resonance. However, I saw no evidence that the foam was touching the back of these domes. These are those kits. https://reverb.com/item/93384868-jbl-035tia-tweeter-damping-replacement-pair
Images of the Polk RD6515-1 cleaned off and the old foam. Looks almost exactly like the replacement JBL stuff.
