Help! Memphis 15" makes buzzing noise at low volume

[Sk8almost44 10+ year member]

Hello, I am having this problem with my 15" Memphis..

I bought it and it makes this buzzing noise only at low volume.. Unless I hold it down in the one corner. I do not get it?!?

Please watch the video below, it is had to explain in words.. If you need more detail please let me know, I can take pics and record more videos.

Click to read more...

 

[roko 10+ year member]

I think maybe coil rub bro pull it out and use digital multimeter and check the coils

 

[Sk8almost44 10+ year member]

I got 1.7 on each side

Also, when I push down on one side, it makes a scraping noise like it's rubbing on something.. but if I push on the other side it doesn't make the noise. When I tap on it it makes a "thud" noise, instead of a drum noise. I posted a video below:

 

[Sk8almost44 10+ year member]

Bump

 

[ciaonzo 5,000+ posts]

Those tops are removable, take it off and have a look for evidence of rub and make adjustments in the opposite direction when you reassemble.

 

[Sk8almost44 10+ year member]

Those tops are removable, take it off and have a look for evidence of rub and make adjustments in the opposite direction when you reassemble.

Sorry they may be a stupid question, but how do I remove the top? Thank you so much!

 

[ciaonzo 5,000+ posts]

I believe it's three bolts on the bottom of the motor assembly.

 

[Sk8almost44 10+ year member]

Does it look bad?

Before I took it apart, I noticed the 3 screws in the back were a little loose... Maybe a problem with the "thud" noise when I would tap on it.

After I took it apart, rotated it, and tightened the 3 bolts it still has the rubbing noise. Also when I tap on it, it still doesn't sound like when you tap on a normal subwoofer, it doesn't go down much freely when you lightly press down on the center either.. Are the bolts too tight?

 

[Sk8almost44 10+ year member]

bump

 

[Sk8almost44 10+ year member]

Update:

I rotated the top piece, and screwed the screws in all the way (tightly) and it made the cone very firm when you lightly press down. When you tap the cone, it didn't make that drum "thud" noise..

Loosened all 3 bolts a little, noticed a rub still. This fixed the firm feeling when you lightly press on cone, made the drum "thud" noise that you usually hear when you tap on the cone.

Loosened 1 bolt where it was rubbing, helped a lot with the rubbing problem.

Loosened another bolt where it was rubbing a little still, and that fixed the problem.

Sounds how it sounded brand new, I guess the bolts come loose over time and causes it to shift around and could cause rubbing if not adjusted over time..

Thank you so much for your time and helping me fix the problem!