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hum with dynaudio monitors

Hello

I've recently bought new studio monitors - dynaudio bm5a with rme fireface 400 audio interface.

The problem I'm facing with is that they play really quiet, almost unnoticable noise - buzz (hum).. If I dont play the music the hum is present.

Whether I try to unplug the monitors from the audio interface I can still hear the hum.

I read somewhere I should try to move them (to increase the distance betwen electronic equipment), however this does not help..

I also tried emailing dynaudio company but they didnt respond..

Anyone has any similar experience and knows what could be the cause of this?

Thanks a lot for help

are you using grounded cables?

Grounded cables? I use cables that came along my monitors and normal xlr to connect monitors with audio interface but xlr has nothing to do with it since nothing changes if I unplug them from audio interface.

And yes, the monitors stand really near my laptop.

Surely those monitors are magnetically shielded? They should not be making any kind of unwanted hum no matter how close they are to the laptop. Are you using an external amp?

it's probably your laptop.

can you still hear it when you unplug the ac adapter and run off battery? is your laptop a Dell?

Strange, I don't remember ever hearing something like that from mine. Mine are like 15cm either side from my laptop (A Dell XPS).

I'll switch em on tomorrow and see if I get the same hum.

Even if I unplug the laptop or move it from the desk (or even turn it off) I can stil hear the hum..

I guess it has nothing to do with laptop then..

Another thing I noticed is if I turn on/off my lava lamp, I can hear some sound in my monitors (something like "pluk")..

Thats really strange..

quote:

Originally posted by Quinders Surely those monitors are magnetically shielded? They should not be making any kind of unwanted hum no matter how close they are to the laptop. Are you using an external amp?

I dont use external amp, just rme fireface 400 (audio interface)..

Lights with a fader/dimmer switch can also cause distortion in the power which then causes a hum in your speakers.

I have it when my parents turn the lights on downstairs. When dimmed the distortion is there, when the lights are put at maximum it's gone.

Other than that it could just be bad wiring in the house. Or too thin/cheap audio cables which aren't shielded (maybe lying next to an electric object too close?)

Ah actually mine do this too but it's barely noticeable. Is your's really loud?

Mine are only plugged into the power and when I turn them on and put my ear right next to the tweeter I can hear a hum but I don't think that's abnormal. It's a machine. Machines make noise. You can't expect it to be completely silent.

If your monitors have a trim knob turn this right down, i had the same problem with my monitors

quote:

Originally posted by Fledz Ah actually mine do this too but it's barely noticeable. Is your's really loud?

The dimmer we have downstairs is of bad quality, my speakers are on the smae power group .

It's not really loud or anything but it's there and easily noticable.

quote:

Originally posted by Storyteller The dimmer we have downstairs is of bad quality, my speakers are on the smae power group . It's not really loud or anything but it's there and easily noticable.

Same here..

The problem is I moved to new flat and bought new speakers (dynaudios)..
I have m-audio bx8a at home and I never had any problems with them - never had faced any hum/noise problems..

Since dynaudios are supposed to be much better (and much more expensive) I'm almost certainly sure this has something to do with something else - electricity or something.

quote:

Originally posted by Storyteller The dimmer we have downstairs is of bad quality, my speakers are on the smae power group . It's not really loud or anything but it's there and easily noticable.

Ah well see that's the difference then. I've had mine for like 6 months and never noticed before until this thread brought it to my attention. I have to stick my ear right on the tweeter guard to hear it, and everything has to be quiet. Doesn't really seem like a problem for me. They are quality monitors so I doubt this will ruin them in any way.

quote:

Originally posted by Fledz Ah well see that's the difference then. I've had mine for like 6 months and never noticed before until this thread brought it to my attention. I have to stick my ear right on the tweeter guard to hear it, and everything has to be quiet. Doesn't really seem like a problem for me. They are quality monitors so I doubt this will ruin them in any way.

In my case its just the fact I dont want monitors for 1100€ to play hum (even if its so quiet).

quote:

Originally posted by palm so call the electritian to put up a separate course for your studio and check out the filters ive been talking about.

Will try that.. Thanks!

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