Ampeg 4x10HE tweeter problem

[DerekP]

Hey all, today I plugged into my old setup (ampeg v4bh and ampeg 4x10HE) and started playing and I noticed a metallic kind of buzz coming from the tweeter. I tried turning it all the way down(where it normally stays) and the buzz was quieter but definitely still there.

Now this is where it gets kind of Wierd. I plugged my fender super bassman into the 4x10HE And there was no buzz or rattle whatsoever. Then I tried to my ashdown lb30 and again no buzz at all, even with the tweeter and treble cranked.

Then I figured I'd try plugging the ampeg v4bh into my fender 4x10 neo and there no was no buzz at all and it sounds great, so I'm really confused as to what would be causing this and whether or not it's the amp or cab. Any insight would be appreciated!

I did try tightening all the screws and taking the amp off the cab and there was no change. Let me be clear, it doesn't sound like a distortion or that anything is blown but I'm not expert!

 

[DerekP]

Anyone?

 

[DerekP]

Bump for a response

 

[David Jayne]

Strange. You'll just have to keep rotating pieces until you nail it down. My guess is it's the cab--check all the wiring terminals inside. Maybe one is a bit loose/wobbly.

 

[JeffontheBass]

Sounds like you blew the tweeter diaphragm, do you play with distortion with the tweeter turned up?

Here's a link to where you can get a new diaphragm

http://www.speakerrepair.com/page/product/10-191.html

just ordered this one for my tweeter in my Aguilar cab, this diaphragm fits most tweeters in most cabs, pull your tweeter out and see what model it is. There is also a video on the link that shows you how to replace it, it's very simple.

Hope that helps, Jeff

 

[B-string]

It is noise from the V4BH. The HE cab having a higher frequency response made it noticeable. Have you tried your old setup again? It could have been a dirty input jack from non-use.

 

[B-string]

Sounds like you blew the tweeter diaphragm, do you play with distortion with the tweeter turned up?

Here's a link to where you can get a new diaphragm

http://www.speakerrepair.com/page/product/10-191.html

just ordered this one for my tweeter in my Aguilar cab, this diaphragm fits most tweeters in most cabs, pull your tweeter out and see what model it is. There is also a video on the link that shows you how to replace it, it's very simple.

Hope that helps, Jeff

Tweeters don't buzz unless that is the sound sent to them. Scratchy or no sound would be a blown tweeter.

 

[David Jayne]

It is noise from the V4BH. The HE cab having a higher frequency response made it noticeable. Have you tried your old setup again? It could have been a dirty input jack from non-use.

Seems likely. I had to read the post again--I thought he'd tried the original setup again(with no noise) but he hasn't.

 

[DerekP]

Thanks for the replies! Ill look into the diaphragm.
I've tried different speaker cables, instrument cables, different basses etc

I do you use drives and distortions but I always play with the tweeter off even when I'm playing clean.

About it being the amp..how would you explain that the amp sounds great with a different speaker? Also by "old setup" I just mean it's not my main rig but I still use it a couple times a month.

 

[DerekP]

Seems likely. I had to read the post again--I thought he'd tried the original setup again(with no noise) but he hasn't.

Yeah sorry I wasn't very clear, everytime I plug the v4bh into the 4x10he it makes the noise. But with different amps into the 4x10he there is no noise

 

[David Jayne]

Yeah sorry I wasn't very clear, everytime I plug the v4bh into the 4x10he it makes the noise. But with different amps into the 4x10he there is no noise

If this is the case, it's kinda GOT to be the amp. Why it doesn't do it into the Fender cab is weird--B string thinks it's because the Fender cab can't reproduce the noise because it may have a lower frequency response. I'd say that's reaching a bit but it's possible. More likely? The Fender tweeter simply isn't working. Thus the Fender cab won't make the sound as it's too high for the woofers to reproduce by themselves.

 

[B-string]

If this is the case, it's kinda GOT to be the amp. Why it doesn't do it into the Fender cab is weird--B string thinks it's because the Fender cab can't reproduce the noise because it may have a lower frequency response. I'd say that's reaching a bit but it's possible. More likely? The Fender tweeter simply isn't working. Thus the Fender cab won't make the sound as it's too high for the woofers to reproduce by themselves.

Actually this IS what I was suggesting

 

[DerekP]

Seems likely. I had to read the post again--I thought he'd tried the original setup again(with no noise) but he hasn't.

If this is the case, it's kinda GOT to be the amp. Why it doesn't do it into the Fender cab is weird--B string thinks it's because the Fender cab can't reproduce the noise because it may have a lower frequency response. I'd say that's reaching a bit but it's possible. More likely? The Fender tweeter simply isn't working. Thus the Fender cab won't make the sound as it's too high for the woofers to reproduce by themselves.

Makes sense,I guess it's time to take it to the tech.
The tweeter in the fender is definitely working though.

 

[B-string]

Have you tried adjusting the "Hum Balance" on the V4BH for minimum hum?

 

[David Jayne]

Actually this IS what I was suggesting

I feel ya.
: )