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What could be causing the speaker on a vox vt80+ to sound blown, when separating the speaker from the amp it sounds fine & there seems to be no problem with the amp itself, what cuold be happening here?

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  • 3,368 Answers

Probably vibration. Give the amp some time it probably will fail.

Posted on Nov 04, 2014

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Posted on Jan 02, 2017

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  • 31 Answers

SOURCE: NAD C370 Amplifier

This sounds like a problem with the protection circuit, and/or the speaker relays. More specifically, a capacitor within those circuits that is not behaving properly. I strongly suggest having it looked at ASAP. 

Posted on Sep 17, 2008

  • 24 Answers

SOURCE: Getting occasional popping sound through

Describe your system in greater detail. Does the preamp have a mechanical selector for the tuner/phono/CD or does it have a digital selector that you can operate with a remote? The problem might just be a dirty selector switch that need to be sprayed with Deoxit contact cleaner. It could also be bad cables so try swapping cables with the tuner.

Posted on Dec 28, 2008

MNfisherman
  • 11896 Answers

SOURCE: Blown fuse no sound in one channel

The only way this could happen is either the wires touching or a capacitor overheating and shorting out, Also hardly bumped or dropped would cause loose solder connections. Wich you should check eitherway

Posted on Feb 04, 2009

  • 133 Answers

SOURCE: scratching sound from right speaker connector

Try resoldering the speaker connector pins on the printed circuit board (if they actually are soldered to the board), there might be a loose solder contact, otherwise see if the connector is dirty and clean it if necessary.

If possible, check any other connectors and components for dirt and / or bad solder contacts and resolder if necessary.

Another quick thing is to check the relay which provides for the delayed speaker turn on - see if the relay contacts are dirty (brown, oxydized, kind of dark, burned color), if so, they need to be cleaned well with some fine sandpaper.

The relay (usually a black rectangular block about half the size of a matchbox) will usually have a plastic top cover which is snap mounted, if you can't remove the cover easily then it's better to desolder and remove the relay, open, clean and resolder it or even replace it with a new one. Some relays may have the top cover glued onto the housing in several spots which makes them more difficult to remove the cover and others still will be completely sealed with epoxy and therefore very difficult or impossible to open without damaging or ruining them.

Also, it could be something else, the above suggestions are just some of the possible causes and solutions.

Hope you can get it fixed.

regards

3rq8 (Triarcuate)

Posted on Sep 16, 2009

  • 561 Answers

SOURCE: I have no sound coming from my amp a rotel rb 981

it is never advised to change wires while the amp is switched on. you may have blown your diodes on your post amp then you have a problem.
have you tried other speakers tested your speaker on another system to rule them out as OK?
if you open the case be careful not to touch any large capacitor as they may still be chared and can give you a nasty belt.
any fuses should be easy to find and to see if they are blown. ensure you get the same rate fuse when you replace. if you see any charing of diodes then i think repair may be costly. good luck.

Posted on Nov 12, 2009

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If the speaker is left connected to that source long enough, damage to the speaker and the amp may occur.

Without changing positions of the speakers: You can disconnect the affect Front or Rear L & R speakers and swap them (connect the L speaker to the R output of the amp and vice-versa). If the buzzing / hum "moves" to the other speaker, then the amplifier has the problem. If the buzzing / hum stays with the same speaker, the speaker has issues and is likely "blown".

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