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Neumann U87 fading in and out

The sound comes and goes over a 2 sec period. 2 on 2 off. sounds to me like it might be a prob with phantom power the way that it fades in and out. let me know if there is any ideas.

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  • fecior Dec 05, 2007

    i have same problem , i think it's a problem with the phantom power inside the microphone .hellppppp....

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Posted on Dec 11, 2009

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My u87 cuts out when you get to close but comes back on in 2 secs seems to be wind pressure from singing. many thanks Graham


problem is a dirty capsule caused when fogged with humidity from breath it shorts out temporarily. it maybe possible to have it professionally cleaned but may need to be replaced. DO NOT USE FOAM POP FILTERS. Spend the money on a metal one. back off if you wanna save some loot.

May 18, 2011 | Neumann U87 Professional Microphone

1 Answer

My U87 microphone won't power up...no signal. does anyone know why this may be happening?


Was it working fine before it stopped powering up? The U87 is a condenser microphone so maybe the reason it is not powering up is because the phantom power on your interface was not turned on. Plug the U87 into your preamp and then switch on the phantom power (48V) to get it powered up. If that doesn't help, there must be an internal fault within the microphone or in your preamp.

Mar 02, 2011 | Neumann U87 Professional Microphone

1 Answer

Neumann TLM mic is inoperative when connected to PA with same cable that worked with Shure SM 58 mic


The Shure SM58 is a dynamic microphone instead of the electret one Neumann TLM 103. This means that Shure does not need a phantom power supply voltage, instead of Neumann TLM 103; this one needs 48Volts. Here are the specifications for each one of the microphones: Shure SM 58 - Neumann TLM 103. In case you use a pre-amplifier or an audio console try to locate a switch marked as "Phantom Power" and turn it on. Typically there is no problem supplying a phantom power at the SM58. In case you have no phantom power switch available, either post back the mixer brand / model to check it for you, or post me a question to suggest you one. Details about the usage and the mixer you are already using will help me to clarify the total audio situation.

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Jan 27, 2011 | Neumann TLM 103 Professional Microphone

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I recently heard that the EV-757 was the best mic ever made for vocals. What compares to it or even surpasses it in the new line of EV mics? Also, are the new ones American made like the old ones?


Don't know if I'd go that far. Microphones (like other gear) has specific design characteristics. The EV757 is a great mic and is best suited for female vocals (or Art Garfunkle). I paid $190 in the early 90's ($390 retail). I like dynamic mics for their ruggedness and no ned for phantom power. A condenser mic like a Neumann U87 cost $3,000 but faithfully reproduces. "Best" can only be used in conjunctioon with "for a particular purpose"

Jul 09, 2010 | ElectroVoice...

1 Answer

Picking up rf signal on my u87I


Wow that is annoying! Sounds like it's not properly shielded. Check out this site http://www.heilsound.com/amateur/tips/rfi_removal_mics.htm

Jul 23, 2009 | Neumann U87 Professional Microphone

1 Answer

NEUMANN U89 SOUNDS VERY FAINT


Your mixing board may not be supplying 48 volt phantom power, which is required by the U89. Check with a voltmeter from pin 2 of the XLR to pin 1, see that it's 48 +/- 4 volts.

Nov 25, 2008 | Neumann U 89 i Professional Microphone

3 Answers

Neumann U87 is distorting and cutting out


As condenser microphones 'mature' they may accumulate contaminants on their diaphragms, which in turn provide a relatively low impedance bypass for the bias voltage. To check if your microphone may suffer from this effect, hold it close to your mouth and breathe (heavily) a few times on the head. The moisture from your breath will condense , and if there the capsule is compromised by contaminants, or if it has developed other flaws, you will hear an increase in frying sound and/or complete loss of output.
Sometimes the capsule can be cleaned, thus extending its useful lifespan. At the risk of causing irreparable harm to the heart and soul of the microphone, this procedure should not be attempted by an inexperienced specialist! If in doubt, sens the microphone to the Neumann Service Department in Old Lyme, CT or another qualified specialist.

Uwe Sattler,
Technical Director - SEC

May 25, 2008 | Audio Players & Recorders

1 Answer

Neumann U87 no signal


Who serviced the mic? Send the mic to Tracy Korby or Klaus Heyne.

The capsule can get dirty and then behave in the way that you describe. It is possible that a simple cleaning by a professional will bring the mic up to spec.

Apr 06, 2008 | Neumann U87 Professional Microphone

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