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Monitor Humming and Buzzing
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| PsyCode |
| I recently just bought a Denon CD deck and a Behringer VMX300 VCA Controlled mixer and routed them via "Hosa" Brand unbalanced RCA to a pair of KRK Rokit RP8 Monitors as outputs. The speakers play well but sometimes I hear some unwanted humming noises. I can't figure it out but I notice when I change the mixer's levels on the main out and channel gain on the mixer, the humming stops and then starts again, kinda spuratic. What are the main causes of it? |
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| whatsupd0g |
Probably an electrical grounding problem.
Contact an electrician to have him/her survey the area. |
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| DJ 00 Tommy |
It all depends on what kind of hum it is.
Most people who work with this can listen to the hum and have a good idea of what kind of problem is causing it.
Iv learnt abit this because iv stuggled with ground loop problems, mechanical noise interfearance (from pc hdd/cdrom), problems with laptop power supply, distortion & interfearance from other appliances in the house.
I would suggest trying some other equip of some sort.
Could always try buy a cheap ground loop isolator for about $20 off ebay. Could also buy a power filter.
If its more of a deep kind of hum/buzz (burr kind of noise) then its probably not an earth loop problem. |
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| richg101 |
i would probably say it is your behringer. i think my mixer is the vmx300... got it about two years ago and from about two weeks i noticed it had a buzzy hum. not a 50/60hz mains hum. more like an internal static sound. it stops and starts. best way is to work out an optimum level output on the behringer. and turn the krk's down to compensate. i think you will find the volume of the hum wont be affected by the master level on the mixer being turned up.
i think some people get lucky with a behringer and it lasts long enough for the low price to be worth it. a lot seem to die very early.
i think if the hum is mains based it will be constant and not stop. but the fact that when you play with the mixer it stops then it sounds like you are discharging the static out of it. so itll prob be static based.
google will explain ways of beating static so have a play maybe and see if thats the case. otherwise id take the mixer back and get another... |
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| No Left Turn |
| a common occurrence of this is when you have a power cable touching and running parallel to an audio cable. this may not be the case, though, since you said the hum is spurratic. |
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| optik |
it's most likeley a ground hum.
record it, normalise it and post it.
to get rid:
make sure your house has good wiring -= plug everything audio into a SINGLE outlet in your studio (using multiblocks) and it should go away. |
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| DJ 00 Tommy |
A good ground loop isolator can work wonders. Some people say that ground loop isolators affect audio quality but the difference in the quality of the audio itself wont be noticable unless you have are an audiphile with a pretty nice setup. thats not the case so i would opt for getting one. It cuts out all dc current (tries to), so it may fix the problem caused by the mixer.
Like people have posted it is most likely not a ground loop problem. |
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