I am having trouble with one of my pair of MXL 603 microphones that I bought recently. It makes a 60 cycle humming noise when I am in a certain room in my house, but not in any rooms upstairs (I haven't tried any other rooms downstairs). I switched the microphones so they used different cables, but It's not the cable's problem, since the hum still came from the same mic. When I move it away from the wall, It reduces, so that if i'm in the center of the room it's half way gone. If it's in the center of the room, and I put my hand in front of it, the hum goes away, but If it's near the wall (where I want it to be positioned around my piano), I have to physically touch the microphone for the humming to stop. It's only with that one though, and not with the other one, and they both came together. I turned off the wifi, turned off the power in that room, and turned off a ipod speaker system in the room as well, but nothing has worked....
SOURCE: Hum from speakers
I suspect an open ground or bad cnnection in your hdmi cable to the amp from the sat.A hum is very indicative of that situation
SOURCE: Vocal Recording
You will need to run the mic through a mixer that has phantom power. Without the phantom power supply, the microphones active circuitry will not be able to work.. Good luck, any problems getting your rig up just ask. A "FixYa" rating for assistance would be great, thanks
SOURCE: Bose Wave radio humming noise
Actually the problem was caused by a bad 470uf cap, that was used to filter the powersupply for all the analog amps. Replaced the cap the unit works like new.
SOURCE: Problems with my MXL 990 (radio)
g'day mate.
The problem you have will relate to the big antennas in your area. Most radio stations pump more than 100,000 watts these days. So it really comes down to the shielding and what's called Radio Frequency Interference rejection of your microphones to keep this out. I would STRONGLY urge you to take the mics back and get a refund,or change them over for something else. They are VERY cheap, there is no real solution to your problem, except for better design... means spend more mullah. If you are looking for a decent low cost condenser mic, I recommend an AKG Perception. I have used AKG for years, and this mic is a great sounding low cost unit.
Hope this helps you. Nothing can be done to improve what you have, they are a cheapo item. Good Luck
regards
robotek
SOURCE: Humming Noise
When you unplug the HDMI cable it stops. This tv is a piece of **** by the way. It's garbage parts thrown togethor by the chinese.
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