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buzzing noise

post #1 of 12
Thread Starter 

im using my friends dared mp5 tube amp, audio files are lossless, source is my ibasso dx100, line out cable is a 10 bucks 3.5 to rca cable from radioshack, headphone is beyerdynamic dt990 pro 250ohm. i keep on hearing this buzzing noise, is it supposed to be there because its a tube amp? i previously have no experience with tube amps. i did not have buzzing noise when i used to use fiio e17 with an ipod though

post #2 of 12
Does it go away when you touch the amp? Coud be electrical interference or a ground loop problem. Anything else plugged into same wall/strip/circuit as the amp?
post #3 of 12
Thread Starter 
Quote:
Originally Posted by peepr View Post

Does it go away when you touch the amp? Coud be electrical interference or a ground loop problem. Anything else plugged into same wall/strip/circuit as the amp?

 

 

i dont think it goes away when i touch it and i have other things plugged into the same wall outlet too... when i adjust the volume, theres more noise, when i put on some music, the noise is a little less noticeable, probably because its being covered by the music. on quiet passages, the noise becomes quite noticeable and sometimes may even be louder than the music. 

post #4 of 12

i had a powerline adapter plugged into same wall as my magni amp and it caused a ton of static even without the RCA cables plugged into magni, just the power cable.  Try plugging amp into its own socket on wall and then everything else onto a power strip on a different wall outlet, and then try different disconnecting different items and see if/when it goes away. 

post #5 of 12
Thread Starter 
Quote:
Originally Posted by peepr View Post

i had a powerline adapter plugged into same wall as my magni amp and it caused a ton of static even without the RCA cables plugged into magni, just the power cable.  Try plugging amp into its own socket on wall and then everything else onto a power strip on a different wall outlet, and then try different disconnecting different items and see if/when it goes away. 

 

 

i tried that before but had nothing playing on the background and the buzzing noise was definitely there. 

post #6 of 12

If it is a tube amp, it could be a tube.  I think tube amps are noisier than solid state.  I've only heard one tube amp that did not make a buzzing sound.  I use low impedance headphone though.

post #7 of 12
Thread Starter 
Quote:
Originally Posted by pyramid6 View Post

If it is a tube amp, it could be a tube.  I think tube amps are noisier than solid state.  I've only heard one tube amp that did not make a buzzing sound.  I use low impedance headphone though.

That may be it
post #8 of 12
Quote:
Originally Posted by reddragon View Post

im using my friends dared mp5 tube amp, audio files are lossless, source is my ibasso dx100, line out cable is a 10 bucks 3.5 to rca cable from radioshack, headphone is beyerdynamic dt990 pro 250ohm. i keep on hearing this buzzing noise, is it supposed to be there because its a tube amp? i previously have no experience with tube amps. i did not have buzzing noise when i used to use fiio e17 with an ipod though

 

Do you still have this noise if you unplug the source cable?

 

If so, there may be something wrong with the amp. Without source all you should hear is a faint white noise at full volume, but surely no buzzing. 

 

Otherwise it would point to either a ground loop (if your source is also AC powered) or a faulty cable. 

post #9 of 12
Thread Starter 
Quote:
Originally Posted by PleasantSounds View Post

Do you still have this noise if you unplug the source cable?

If so, there may be something wrong with the amp. Without source all you should hear is a faint white noise at full volume, but surely no buzzing. 

Otherwise it would point to either a ground loop (if your source is also AC powered) or a faulty cable. 


Unplug the cable is still the same. My source is not AC powered. My cable is a cheap 10 bucks cable from radioshack, may very well be the cable
post #10 of 12
Quote:
Originally Posted by reddragon View Post


Unplug the cable is still the same. My source is not AC powered. My cable is a cheap 10 bucks cable from radioshack, may very well be the cable


Your source isn't AC powered, but your amp is, right? That may be an issue (ground loop). Have you tried using other AC outlets in your place? Is it the same everywhere? Try switching off other appliances in your room (and the kitchen, if possible), and see if it still happens.

post #11 of 12

Can you try the amp at a different location? Could be some interferences that the amp is picking up. Power filter may help, but don't spend money until you're more or less sure this is the issue.

post #12 of 12
Thread Starter 

sorry guys, have been pretty busy with school lately so havent been on for a while but no i have not tried it anywhere else, my amp is ac powered. thanks for the suggestion, i will report back once i have tried that, thanks 

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