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Neumann U87 Issue or Anomaly? Condenser Microphones
Old 7th July 2016
  #1
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Motoxxx's Avatar
 

Neumann U87 Issue or Anomaly?

So tonight I put up a U87 (ai) for a very dynamic vocalist and it just didn't seem to sound quite right. It seemed to have lower output than normal through my consoles pre amps (Neve RL1/9098) and seemed to distort quite easily. I also noticed the input gain meter seemed to be sort of low when talking into it but would seem to spike up not quite peaking but just about on the louder passages.

I ended up throwing up a TLM 49 (which actually worked killer on the vocalist) to get through the session. Later I switched channels on the board and cables and bypassed all of the studios patch bays, tie lines etc and went directly into the back of the console. Now the mic seemed OK but the bottom end when in cardioid seemed a bit weak. Then I switched to figure 8 and the back side sounded awesome, just like it should but so did the front....I switched back to cardioid and it seemed like the mic was just lacking on the bottom end.

Has anyone every experienced this? the diaphragms should sound the same when they are in figure 8 and they do. In omni the sound is good all around but seems light on the low end. In cardiod. the front of the mic just seems to be lacking..

Any input is appreciated.
Old 7th July 2016
  #2
Gear Addict
 

Sounds like a dirty capsule -> It should be quite searchable. either requires cleaning or replacement - a cleaning is usually in the region of 200usd and a replacement is much more...

If you're in a pinch you can flip the capsule and use it in cardoid but it's not ideal.
Old 7th July 2016
  #3
Gear Addict
 

a quick verification can be achieved by doing the breath test.

Power up the mic and breath on the capsule as if you were fogging a mirror. If the mic goes dead/starts dropping out /crackling/rumbling/loses bottom end and it lasts for more than a second or two - you've got a dirty capsule
Old 7th July 2016
  #4
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Quote:
Originally Posted by africantigercow View Post
a quick verification can be achieved by doing the breath test.

Power up the mic and breath on the capsule as if you were fogging a mirror. If the mic goes dead/starts dropping out /crackling/rumbling/loses bottom end and it lasts for more than a second or two - you've got a dirty capsule
This was the very first thing I did. No crackle or dropping out that is why I thought it was strange. Trying to decide if I need to send it off to Dave Brown or just deal with it. My other 87 is out on loan so I can't do a side by side comparison for a few weeks. I have some other nice mics but this strange anomaly was throwing me.
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