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Jon
10-11-2003, 03:17 PM
I recently came across a rt 3000p sub new in box. I set it up and it works fantastically untill there are any very demanding bass passages. At which point the top woofer will produce a small buzzing/crackling sound which seems to be comming from the surface of the woofer. None if the seals seem damaged the lower woofer does not have this problem. Does any one know what might cause this problem, once again the sub is brand new. All help is very much appreciated.

thanks in advance
Vr3MxStyler2k3
10-11-2003, 03:52 PM
Press evenly around the dust cap of the woofer, slightly in, if you hear any rubbing. It is rubbing the voice coil. if no rubbing occurs, then I will leave it to these nuckle heads around here to help you further.
Tour2ma
10-11-2003, 04:19 PM
First, welcome to the Club. Interesting that you found the bass half of an RT3000p.

Overall I think you are just asking a bit much of the bass unit, but can't say for sure why one driver is giving up and not the other. One thing is your report of "demanding bass" and then there's the fact that these were designed to operate in a "stereo" pair.

Ken Swaugger of Polk CS may be able to give you added advice.
Jon
10-11-2003, 05:16 PM
Sorry, to clarify on that its not my LFE, I am using it in line with my center channel, so i can run it full range.
Tour2ma
10-11-2003, 05:40 PM
No problem...

So you are obviously running your center "large". Are you sure your AVR separates out the LFE from the other bass info?
Jon
10-11-2003, 08:43 PM
Actually im not i have an onkyo 575x currently, I will have to check that out, Thanks

additional information: it appears to be volume independant. I can turn the volume up and it does it as it would at one half volume.

Could it be an air leak?

**I have been playing it for about a hour and its doing it consistently now, its a distinct buzzing noise only in one of the woofers.
Tour2ma
10-11-2003, 10:11 PM
If it's degenerating, and it sounds like it is. Try the test Sid (Vr3) suggested above.

Need to have no signal going to woofer during test. Compare the good for the bad for resistance and noise when you push gently on them. Push on the outer edge of the cone, just inside the surround, with thumb and fingers of one hand spread evenly around the perimeter.
Jon
10-12-2003, 02:10 AM
the good one seems to be offering a different amount of resistance
Tour2ma
10-13-2003, 01:24 PM
Less resistance? or more?
Jon
10-13-2003, 01:41 PM
it appears to be less resistance
Tour2ma
10-13-2003, 02:34 PM
OK, that fits. Would appear that the bad one is dragging probably due to the voice coil separating. Next move will be to contact Polk CS to verify and order a replacement...
Jon
10-13-2003, 02:50 PM
Thank you for all the help Tour2ma, i really do appreciate it.
Tour2ma
10-13-2003, 03:52 PM
You're welcome and please post resolution of the issue. It's always nice to read how a problem is finally resolved...