Ampeg 810 buzzing

redbeard1206 · #1 07-01-2011, 06:49 PM

I just noticed a buzzing in my Ampeg cab. It's only slightly noticable sometimes, but much more noticeable when I play 1st fret F on my low E. The buzz is very apparant at low volumes, but when I turn up a bit you can't really hear it. I'm not sure if it's a blown speaker or what. I can't seem to locate a particular it's coming from, so I'm not sure if something's loose or blown or about to blow. Any help?

redbeard1206 · #2 07-01-2011, 06:50 PM

Also on higher strings it's not apparent, only low frequencies, and like I said, F in particular.

Kwin Smith · #3 07-01-2011, 06:55 PM

Have you made sure all the screws are tight?

redbeard1206 · #4 07-01-2011, 08:25 PM

Quote:

Originally Posted by Kwin Smith

Have you made sure all the screws are tight?

Yes I have, the buzzing is still there. It almost seems like its coming from the wood around the top 410. It may be the top left speaker, but it's making a really odd buzz, not really like a blown speaker. Theres also a clicking noise that's in there as well.

craig.p · #5 07-02-2011, 04:51 AM

This may be of no value whatsoever, LOL, but try running the cab while it's laid down on its back. This will change how the cab is being stressed physically. Do whatever you have to do to keep the input plug from getting squashed. Also try the cab on its side(s). If the problem goes away, it could be a separated wood joint.

tekdiver500ft · #6 07-02-2011, 05:31 AM

I'm with Craig. My first thought was separated wood joint. That doesn't mean that's what it is, but your description leads me that way.

redbeard1206 · #7 07-02-2011, 09:25 AM

Turned it on it's side and it's still there. I'm starting to think it is the speaker. The buzz and clicky noise change every so often, it sound like it could be a speaker maybe. It's a noise I've never heard before, regardless. Is there any way to tell what speaker is doing it? I'm listening to them and it's really hard to locate which one it is. I'm just puzzled as to why it would be messed up, I've not pushed the cab to it's limit at all.

bump for more help

craig.p · #8 07-02-2011, 12:43 PM

Start moving speakers to different locations but KEEP GOOD NOTES, lol. Or use a heavy blanket/wrap to cover all but one at a time, and listen for when the buzzing is loudest.

As you pull the drivers, make sure none of the speaker wires are sagging and touching the cones. That can cause some strange noises.

You might also have a loose spade-lug connector on one speaker. Or a flaky wire running from the speaker's lug to the voice coil connection near the center of the cone.

JimmyM · #9 07-02-2011, 12:51 PM

You can also GENTLY push in on the cones with even pressure around the dustcap and see if you can feel any rubbing going on. If you do, the voice coil is shot and it needs to be reconed. However, since it's only one note, I don't think that's the problem, but it's an easy thing to check for.

Also, have you tried taking it into different environments and listening to it, like outside? There have been times I've heard rattles that I could swear were coming from the cab I was using, only to find it was a rattle in the room faking me out.

Von Felgenhauer · #10 07-02-2011, 12:59 PM

Quote:

Originally Posted by JimmyM

You can also GENTLY push in on the cones with even pressure around the dustcap and see if you can feel any rubbing going on. If you do, the voice coil is shot and it needs to be reconed. However, since it's only one note, I don't think that's the problem, but it's an easy thing to check for.

Also, have you tried taking it into different environments and listening to it, like outside? There have been times I've heard rattles that I could swear were coming from the cab I was using, only to find it was a rattle in the room faking me out.

The biggest keyword here in GENTLY. I've ruined a great swr speaker pushing to hard to see if it was scratchy. Just the lightest touch should work.

craig.p · #11 07-02-2011, 01:03 PM

Something else to check: make sure all hardware is socked down tight. Handles, towel bar if it has one, etc. Also could be something loose on the jack plate. ~~Does the cab have a crossover? Maybe a loose wire/connector or a crossover component coming off the jack plate?~~

EDIT: Gah! I see it's an 8x10. Never mind the crossover reference.

JimmyM · #12 07-02-2011, 01:04 PM

No crossover in the 810, Craig. Just 10's inside and no tweet so no crossover needed.

craig.p · #13 07-02-2011, 01:05 PM

LOL, Jimmy, you were 2x quicker than my edit!

JimmyM · #14 07-02-2011, 01:19 PM

After 4 you can post with impugnity, Craig...but until then, I'm on it!

Bassoballs · #15 07-03-2011, 09:14 AM

Check the dust caps on each speaker. Sometimes they will come loose and cause a buzzing sound. If it is loose, just reglue it. I've had this happen with a number of speakers over the years.