Go Back   Home > Forums > General Interest > Everything Else

Everything Else Anything related to audio / video / electronics etc) BUT remember- we have many new forums where your thread may now fit! .... Parts, Equipment & Tools, Construction Tips, Software Tools......

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 9th December 2009, 05:34 PM   #1
genmin is offline genmin  United States
diyAudio Member
 
Join Date: Jan 2009
Default Got the speaker buzz

Turned on an amp that has been sitting for awhile, have a buzz coming from one speaker. Never had it before, not to say because it has been sitting that this is why the buzz showed up.Disconnected one of the two speakers and it is apparent that the one has a buzz. No tears in paper or the ribbed paper at the voice coil, no loose wires. Some other party suggested it could have a had a voice coil drop. Can a voice coil being dropped be fixed. Does reconning a speaker not always have to do with a broken cone or ripped up paper. It is a Jensen C12N from a Fender Twin Reverb. Any other ideas as to my problem or an answer to my fix. Maybe someone explain what a voice coil drop is????Thanks
  Reply With Quote
Old 10th December 2009, 02:23 PM   #2
Glowbug is offline Glowbug  United States
diyAudio Member
 
Glowbug's Avatar
 
Join Date: Feb 2006
Location: Hillsborough, NC/McLean, VA
Sounds like what he's describing is a misaligned voice coil, due to sagging of the soft parts...the spider loosening up over time. Try connecting a small battery to test the coil, as described here:

Voice coil rub: Diagnosis and repair. [Archive] - AudioKarma.org Home Audio Stereo Discussion Forums

If that confirms it, you could try finding a recone kit, which would consist of replacing the soft parts (VC/former, spider, cone, surround).
__________________
Jim J.
  Reply With Quote
Old 10th December 2009, 02:32 PM   #3
diyAudio Member
 
chris661's Avatar
 
Join Date: Feb 2008
Location: Sheffield
Blog Entries: 8
Sounds more like interferance to me.

Does the buzz occur when you switch it on, or when you put something through it?
__________________
"Throwing parts at a failure is like throwing sponges at a rainstorm." - Enzo
My setup: http://www.diyaudio.com/forums/multi...tang-band.html
  Reply With Quote
Old 11th December 2009, 04:59 PM   #4
genmin is offline genmin  United States
diyAudio Member
 
Join Date: Jan 2009
No it is not interference, as far as lighting circuits, house wiring or flourescent light transformers. I have it in a Fender Twin Reverb cabinet with another alike speaker,the two together are okay but the one has an issue, I disconnect the good sounding one and the other has what I would call a rattling when either playing a bass string or even higher notes. Not really a buzz, some people call this farting out or flabbing and maybe this is not even what it is, it is audible but sounds like an effect box is being used, just trying to find the cure. I want to know what I really have before I send it off for a recone. At this point until I get enough responses I cannot make the call as far as it needing a recone. As said, no broken parts are visable. I guess if a professional had the item in hand, a better diagnoses could be given, I just thought I would get some input from users and knowledgeable folks like you all. Would like to hear some more
  Reply With Quote
Old 11th December 2009, 11:03 PM   #5
mjf is offline mjf  Austria
diyAudio Member
 
Join Date: Jan 2009
Location: upper austria/near linz
hello.
.......a hidden tear in the paper?
or some dirt/parts between the papercone and the chassis metal?
.....loosely screw or so.
......voice coil scratches? press with your finger a little bit into the center of the cone and listen if you hear some scratching noise (amp off).
greetings
  Reply With Quote
Old 13th December 2009, 10:19 AM   #6
diyAudio Member
 
chris661's Avatar
 
Join Date: Feb 2008
Location: Sheffield
Blog Entries: 8
Oh, I see now.

I had this problem with a 15" paperweight. The driver had been dropped, and the polepiece in the centre of the voicecoil had gone to one side, trapping the voicecoil. Those things are really hard to shift - hit it too soft, it doesn't go anywhere, too hard and it just goes to the other side with a clank.

I'd say replace the speaker, or get a professional to have a look at it.
__________________
"Throwing parts at a failure is like throwing sponges at a rainstorm." - Enzo
My setup: http://www.diyaudio.com/forums/multi...tang-band.html
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Buzz in new amp... chrish Tubes / Valves 10 20th February 2008 04:06 AM
Melos triode and computer as source: BUZZ BUZZ BUZZ zigo3 Tubes / Valves 4 28th November 2007 02:11 AM
hum/buzz with pot all the way up woodturner-fran Tubes / Valves 19 24th September 2007 12:31 PM
P06 buzz elco Analogue Source 2 3rd June 2005 11:48 PM
Can you help with my Buzz?? saurus Solid State 4 23rd September 2004 03:31 PM


New To Site? Need Help?

All times are GMT. The time now is 08:23 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2