art mpa gold noise coming and going

[chess999]

hmm, maybe try a separate external phantom supply other than the art's internal

[BOWIE]

Is it in one or both channels? If it's in one channel, it is likely a tube problem. If it's in both, perhaps it's a power issue.

[beatifictatter]

i wasnt using phantom power, not needed with that mic.....

both channels.....

i'll have another ho today but any suggestions would be very much appreciated....

[soul&folk]

Just a guess but I'm gonna say it's a grounding issue. Try using one of those little orange 3 prong in - 2 prong out adapters and see if that doesn't fix things.

[aquawicket]

I'm have a big problem with noise coming from my Art MPA. I get about -54.1 db of noise that is totally noticeable. And if I route it to something like a Guitar Rig distortion track, the noise become unbearable. I'm running both channels through balances T/R/S cable into my M-Audio Delta 44 box. The M-Audio box accepts balances input as well.

The funny thing is, If I turn off the Art MPA, the noise is still there. But If i disconnect the 2 cables from the M-Audio 44, the noise is gone. I've tested my outlet, and it has a good ground and everything. I'm lost here.

I can even hear extra noise when I move my mouse and click on stuff. Any ideas before I send my preamp to Art to see if it needs to be fixed?

[ALEXROOM]

Make sure to recheck all cables and connectors going into and out of your MPA. Lift the ground on the ART MPA.For you to say even if you move mouse or click on or off a program while your mpa is patched into your system their is noise, it can mean their's maybe a tube that is shorting out completely or even intermittently.

[aquawicket]

*** SOLUTION ***

After scratching my head all day, I found the issue. The case I bought was a rack mount case that just so happened to be painted on the inside too. So I took everything completely out and scratched the paint off of everywhere a screw goes down to bare metal. Power supply screw holes, mother board screw holes , hard drive screw holes, and Pci card screw holes. I made sure everywhere there was a screw that the component getting screwed in was metal against metal. Power supply medal against the case metal etc.

And after hooking everything back up.. The noise was GONE!!!

So all in all.. it was a ground issue somewhere. hope this can help someone in the future.

[ALEXROOM]

Good to hear you have everything under control now go make some great music.

[Old Goat]

Originally Posted by beatifictatter

hello


the odd thing was that when i through confusion and desperation flicked the -10dB pad switch on the z5600 mic (activating it, then deactivating it again), the little pop that that action made seemed to solve the problem....the noise disappeared and the input level lifted back to normal...

but then an hour later the same thing happened.....reduced level and a lot of noise....
the same thing cured it again...

thanks

Sounds more like the mic than the pre.

[agent12ax7]

I have been using a little ART tube MP V3 for a while and the first thing to consider is that the ART tube pre-amps come with shitty chinese tubes installed. Tubes like that will go noisy without warning and in fact are not that quiet to begin with. I recommend replacing the 12ax7 with old stock RCA 7025 or 5751. These are extremely quiet and have spiral wound anti hum filaments. The other factor is I've noticed that the art pre's are a tad noisy anyway. Nice tone but not the most quiet units. I still like my little tube MP. For $65 you wouldn't find a better little pre. It was a bit of a bitch changing the tube however and it's a delicate and difficult job. Anyway people should get wise to the fact that tube gear is nothing without good tubes. Especially studio recording gear.