Audio Discussion > CARVER

Sunfire True MKII need help

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MuchAfraid:
IM new, so sorry if I am doing something incorrectly , but I just bought this subwoofer off ebay, paid 70 in shipping and when it got here I hear a small rattling noise coming from the right side cone ( I presume the driver not the passive radiator)   It is very loud and I like it, but I fear something might have come loose during shipping, the lady already gave me positive feedback, so I doubt she knew it made this sound. I am now not sure if I should send it back , when you get up close to it, you can hear the sound and it is pretty annoying. I made a youtube video of the noise coming from that sub  here is the link.     http://www.youtube.com/watch?v=U1Z38Uv8aeA&feature=youtu.be   could it have been damaged during shipping? or is this s sound from an issue before it was sold?       IF anyone could give advise before its too late to return it( eventhough I do like how loud it is and would hate to spend 70 more to return it)  I would appreciate it.  thank you =)

AdamG:
Alright, here is my guess: It would seem that either A: The spider glue has come down and the spider is flapping around or B: there is lead-tap, where the tinsil leads are hitting the cone. It's very hard to tell in the video. Where abouts are you located? If you remove that driver there will be an accordian-type fabric, this is the spider, and if at any point around the perimeter where it meets the metal basket on the subwoofer it has come loose (the glue may give up eventually) then it may be the sound you're describing. It isn't good to run a sub with the spider loose like that because it allows the voice coil to 'rock' in place when running and will eventually cause a failure. Many glues will do the trick, you can google "reglue subwoofer spider" or something like that and read up.  If it is a lead you can often stick a small adhesive-backed felt pad on the inside of the cone where the lead is hitting and it will quite the noise. If you're in the Pittsburgh area I'm sure someone can help you out, or if you're in the Morgantown area I can give it a good look as well.

Feel free to take pictures of the inside of the subwoofer once you pull the driver so other people can learn what the problem is and how to fix it, or a video like you did before.

-Adam

Kingman:
Easier to remove the plate amp than cone. P.S. Don't touch the caps inside or you'll get a taste of good ole lectricity!!!

OldiesButGoodies:
Agree - take the plate amp off and look.  It may be a s simple as a cable touching the driver that needs to be resettled.

OldiesButGoodies:
After listening to the video I am with Adam that the spider may have come loose.  Below is a picture I took of my Sunfire driver some time back:



The red material is the spider.  If that has come loose,  it can be a tough fix for a DIY.  I imagine someone like Tom Zurcher could fix it properly. I do not see it as simple as replacing the surround on an old speaker.  This spider was designed to handle way more force than the typical woofer spider (long excursion in a sealed cabinet) - the glue must be applied just right to do the job.  If you confirm it is not as simple as a cable touching the cone or similar, I would gently communicate to the seller that driver was damaged during shipping and you would like to return it (unless you and the seller are ok with ordering a new driver from PartsExpress - I think they still have them).

Tom: Can you fix a driver with a loose motor spider like this?

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