Jul 18, 2007 05:26 am Do you have a mains cleanser? Some of the interfence may be coming off the mains, that's the first place i'd check.
Is there a way to get rid of the humming?
Posted on Jul 18, 2007 04:25 am
hybrid
Member Since: Jul 01, 2007
Hi. I'm using a behringer mic100 preamp and it's noisy when the gain/out put is high (just high enough for the mic to be loud enough). It picks up some radio noise as well in my room. Is there anyway to get rid of it? (I think it happened before with my old guitar amp which is solid state.) I've tried to place it at different spots in my room but my room is quite small.
Thx in advance.
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Jul 18, 2007 05:26 am Do you have a mains cleanser? Some of the interfence may be coming off the mains, that's the first place i'd check.
Jul 18, 2007 08:55 am Make sure you don't have power cables and signal cables crossing paths. Wherever possible keep them completely separated...if they must be together, have them running parallel not perpendicular.
Jul 18, 2007 09:20 am ah, no, that would be the other way round: perpendicular, not parallel.
Jul 19, 2007 01:56 pm try to lift the AC ground,
make sure that all your equipment is on the same circuit , that you don't have all your power audio gear mixed up with a TV a printer or something like that.
that your cabling is balanced , and at last... process of elimination I don't know what kind of setup you have but eliminate your devices one by one until the hum is gone
if it's around 60hz for sure it's a power issue I would start with lifting the AC ground.
if it's a buzz, more likely a bad connection ie: soldering points or dirty I/O
And for your amp it's just interference. unbalanced long cable picks up interference basically becoming an antenna.
Jul 19, 2007 03:22 pm Try replacing the tube too.
Those things are usually plenty loud (do you have the -20dB pad button pressed?), so you shouldn't need all that gain.
Oh, and all the other stuff mentioned too..
Jul 19, 2007 03:34 pm You can also try a power conditioner; it may help with noise from fluorescent lights, electric motors and such.
Jul 19, 2007 04:18 pm The main complaint that I hear about the Behri preamps in their mixers is the noise level, especially with higher gain settings.
Definitely look at your gain staging and make sure that you're not having to crank the gain on the Behri to compensate for the gain being set too low elsewhere in your signal chain.
Jul 19, 2007 11:19 pm What is a power conditioner?? >.<"
There's a tube in that preamp...does it have anything to do with it? Cos if it does, I can probably take it back and exchange it for a small mixer that costs around the same.
Thx.
Jul 19, 2007 11:29 pm Power conditioner:
en.wikipedia.org/wiki/Power_conditioner
Some folks swear by the Furman brand, but decent ones can be had for a lot less.
Jul 20, 2007 06:35 pm Furman now has a budget line which can get you a really decent one for around $75.00 US.
I am one who swears by Furman as well.
Jul 21, 2007 02:23 pm I did end up exchanging the preamp for a small mixer. Problem solved (even though I don't know why). But thanks heaps guys :)
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