20 Most Recent Audio Technica Audio-Technica AT4040 Professional Microphone Questions & Answers

That is a condenser mic and I bet the others you are trying are dynamic. Does your unit supply phantom power? It should. Or look for a power injector as a separate box.

Use a volt meter to measure the phantom power. Measure DC voltage between pins 2 and 1 and then between 3 and 1. They should measure the same and be between 12-48 volts dc.

Contact M-Audio. They should be able to help you troubleshoot their product.

Sounds like a phantom power issue. Good Luck, Cody J.

Remember this is a condenser mic that REQUIRES phantom power. There are several failures regarding this phantom power delivery that COULD cause your problem.

A "LEAKY" mic cable that is not a fully balanced cable can cause the problem. Test with another cable to exhonorate your cable.

A failure of the input bypass caps in your amp/preamp can cause the input to become unbalanced and let in hum.

A phantom power that is improperly filtered can also cause this. Test using a different source of phantom power.

Remember that you can easily get feedback that may oscillate like hum if you have a monitor speaker anywhere in "earshot" of the mic. They are very sensitive and intended for studio use.

is this a power mic? check with a back up mic if it does it with the backup its not them its past them. I’m happy to assist further over the phone at https://www.6ya.com/expert/james_1cb31da1bc8c6102

you can test the cable from connection to connection for continuity from end to end. There should be no resistance( a complete short) If the cable is good, there is a bad or broken connection inside the mic. Good Luck

If you have replaced the cartridge then it must be the cartridge pre-amp that is faulty. If there are any other functions on the device such as CD, then it will not effect them. Unless there is crackling on any other function then the pre-amp has a problem. The pre-amp itself is generally a single IC. You can find it by following the turntable connection back to the inside of the amp. The signals will pass through the IC before being passed to the main pre-amp.

Use an alternative device connected to the input the turntable usually connects to. If both channels work ok the new turntable is clearly faulty and should be returned under warranty.

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You should go back to the local repair shop and ask them to do the job right or to give you the money back you presumably paid. You have a legal right to have them fixed properly.