Injection mold marks on my speaker cone???

[Jack Hammer]

I just mounted my center channel above my tv and was seeing if I liked the way it looked better with or without the grill when I noticed what look like some kind of little bumps on the speaker cone. There are seven of them and they look like maybe there some kind of injection mold marks.

This is as close as I can describe them. The bumps are about a half millimeter in height in a hexagonal pattern. There are a total of seven with two bumps next to each other and the rest evenly spaced apart. Here is a bad drawing. Ignore periods, used them as spaces. Bumps look like the asteriks.
....**
*........*
*........*
.....*

The speaker is an M&K LCR851 Center. The bumps are on both woofers, but are much more pronounced on one than the other. I checked all my other speakers and none of them have anything like this.

M&K has a solid ten year warranty. But I don't really want to send it back if it's not a problem and be without a speaker for a while.

Has anyone ever seen something like this? Will it affect sound (so far it sounds fine to me)? Is it a defect or something normal? Any ideas?

TIA

Jeff

 

[chikoo]

should not be a problem. However your best bet is to check out other M&K center channel speakers and consequently speak to the cust. rep. about the same.

 

[Sheep]

Can you take a pic for us?

SheepStar
PS- just use spaces next time

 

[Jack Hammer]

Can you take a pic for us?

SheepStar

I don't have a digital camera, I'll have to borrow one. the one in my phone broke a long time ago.

PS- just use spaces next time

When I previewed the post, all the spaces didn't show, just a bunch of dots next to each other.

I'll try to get a picture tomorrow.

Jeff

 

[Jack Hammer]

I'll try to get a picture tomorrow.

Jeff

Speaking of...

...How do I post a picture? As in once I take it, where do I upload it to?

Thanks

Jeff

 

[Jack Hammer]

Finally got a picture...

...Although it's not a very good one.

These are about a half millimeter high each and are much more pronounced than they appear in the photo.

Jeff

 

[T2T]

Personally, I wouldn't worry too much about it. Then again, you could contact the support at M&K and see what they have to say about it.

 

[Jack Hammer]

Personally, I wouldn't worry too much about it. Then again, you could contact the support at M&K and see what they have to say about it.

I had left a few messages via phone with M&K, but hadn't heard back. My local store said not to worry about it, but they admitted they had never seen or heard of anything like it before.

I just got an email back from M&K, they said to return both defective woofers for replacement.

Thanks

Jeff