Basket bent for over tightening?

[Luca79]

In my 4X12 i noticed the basket touch the wood of the baffle near the screws.
Is this normal, or can have some bad effects?
Right now i loose the screws, but it still look a bit bent. Suggestions?

 

[Oblivion DC]

When you say basket, are you referring to a part of one of the speakers?

 

[JackBootedThug]

In my 4X12 i noticed the basket touch the wood of the baffle near the screws.
Is this normal, or can have some bad effects?
Right now i loose the screws, but it still look a bit bent. Suggestions?

should be fine....pretty common. as long as the seal has good contact all the way around.

 

[Luca79]

When you say basket, are you referring to a part of one of the speakers?

I refer to all the metal basket; it touch the wood where there are the 4 screws, in all speakers.

In my 4X12 i noticed the basket touch the wood of the baffle near the screws.
Is this normal, or can have some bad effects?
Right now i loose the screws, but it still look a bit bent. Suggestions?

should be fine....pretty common. as long as the seal has good contact all the way around.

Thanks, i'll take a pic of it.

 

[John4021]

Overtightening speakers is easy to do. Some say that when you overtighten,you bend the basket,
which in turn cause the cone /surround to rub.

 

[sg guy]

^^^^^^^true dat^^^^^^^

 

[Scumback Speakers]

How to mount your speakers from my site.

http://www.scumbackspeakers.com/mount.html

How to install your speakers for maximum tonal enjoyment.

When mounting your speakers, use caution. Vintage style frames (thinner) require that you mount the speakers using an X pattern method.

A) Tighten all bolts/screws finger tight till the bolt meets back of the speaker frame.

B) Hand tighten in a cross frame or X pattern like a head gasket on a car engine. DO NOT TIGHTEN in a clock-wise circular fashion as you can warp the frame.

C) Tighten 1/4 turn on each bolt in an X pattern in one pass, then the other 1/4 to 1/2 successive turns in successive passes. This will compress the gasket enough to ensure a proper seal, and without warping the frame. I recommend no more than 1 full turn after the bolt meets the back of the frame, usually 2/3 to 3/4 is good.

Failure to do this could result in a damaged cone, bent frame, or unusually high shrill, or muddy bass noises from over-tightening.
DO NOT USE AN ELECTRIC DRILL SET TO A TORQUE SETTING!

 

[Luca79]

How to mount your speakers from my site.

http://www.scumbackspeakers.com/mount.html

How to install your speakers for maximum tonal enjoyment.

When mounting your speakers, use caution. Vintage style frames (thinner) require that you mount the speakers using an X pattern method.

A) Tighten all bolts/screws finger tight till the bolt meets back of the speaker frame.

B) Hand tighten in a cross frame or X pattern like a head gasket on a car engine. DO NOT TIGHTEN in a clock-wise circular fashion as you can warp the frame.

C) Tighten 1/4 turn on each bolt in an X pattern in one pass, then the other 1/4 to 1/2 successive turns in successive passes. This will compress the gasket enough to ensure a proper seal, and without warping the frame. I recommend no more than 1 full turn after the bolt meets the back of the frame, usually 2/3 to 3/4 is good.

Failure to do this could result in a damaged cone, bent frame, or unusually high shrill, or muddy bass noises from over-tightening.
DO NOT USE AN ELECTRIC DRILL SET TO A TORQUE SETTING!

Thanks, i have read this long time ago, and visited your site various times.
But the cab is from '90, i bought used and restored. Speakers always been like that: don't need to over tight the screws for make the basket touch the wood.
In your experience the frame is bent? Anyway it seem the gasket make a good seal, visually.

I took a pic, but is not so useful.

 

[Scumback Speakers]

I remove the speakers and place them on a known flat surface to check them (granite counter top would be easy to find to do this) for any bends.

Those look like G12M Greenbacks in your pic. I'd check to see how much the cork gasket has been compressed. It should have a good 1/8" (at least) sticking out beyond the frame.

Your pic looks too close to the baffle, IMO, but it's impossible to say for sure without a better angle for the picture.

 

[GuitarGuyLP]

+1 on the flat surface check. I bought some speakers from musicians friend once, and they arrived bent. Since that I always check them. If I buy a speaker locally I take something flat like a cutting board and check em out.

 

[Luca79]

If i have time, i will remove the speakers and check them this weekend.

 

[GuitarGuyLP]

Personally if it sounds good I would leave it as is. I don't think you can really straighten the baskets, and removing, and reinstalling could make it worse.

 

[Luca79]

Personally if it sounds good I would leave it as is. I don't think you can really straighten the baskets, and removing, and reinstalling could make it worse.

I already removed them before, for restore the cab. Anyway i straighten a V30 i bought used, and doesn't was so difficult to do with a plastic hammer and caution. I don't know if is the right method but it sound fine to me.

 

[gokart mozart]

Anyway i straighten a V30 i bought used, and doesn't was so difficult to do with a plastic hammer and caution. I don't know if is the right method but it sound fine to me.

If it works, it works!

 

[Scumback Speakers]

You have to be very careful straightening a frame with the cone installed. The voice coil gaps are small, as in around the thickness of a business card or less. The bent frame could pull it to one side and make the voice coil rub. If you're really lucky, you can bend it back straight and be ok, but you have to go slow and do it a little bit at a time.

I've successfully done this a good 10-12 times, but the other 75% of the time the coil didn't go back into it's original place (round, not oblong) and the speaker had voice coil rub, which sounds like a kazoo when you put a signal through it.

 

[Luca79]

You have to be very careful straightening a frame with the cone installed.

I plain to remove them before, and check how is the frame.

 

[Luca79]

Removed one speaker now.
The frame is not bent, but need new gasket.

 

[Scumback Speakers]

Removed one speaker now.
The frame is not bent, but need new gasket.

If the gasket is damaged, usually the speaker won't lay flat when you tighten the screws. How much of the gasket is damaged or missing? Got a pic of the gasket where it's damaged you can post?

 

[Luca79]

Removed one speaker now.
The frame is not bent, but need new gasket.

If the gasket is damaged, usually the speaker won't lay flat when you tighten the screws. How much of the gasket is damaged or missing? Got a pic of the gasket where it's damaged you can post?

The gasket look deformed, but not missing. Probably after years of wrong mount/over tightening.

 

[Scumback Speakers]

Your top gasket pic looks ok, the bottom one definitely looks like it was compressed a little. Might have been a bad gasket from the factory, or overtightening previously.

Try remounting them using my technique on my site (under the FAQ menu, how to mount your speakers), and see if they sound different.