Questions about neumann81.

[faxingberlin]

I just got my neumann81i, even on my nomand. Found in the same setting as big as gain.

The 81 signal is weaker than mkh-60, nomand push, what reason is this, normal, how to solve, thank you.

[absound]

Hi,

Congratulations on getting a fantastic microphone. In my experience, it is normal for this microphone to want more power than others and for the gain on your mixer to be higher than some other microphones. I have also found you have to wait about 10 seconds to have sound after you give it phantom power.

Once it is working, it is a wonderful microphone for many situations.

Adriano

[bigbenboom]

I have two Neumann's and have noticed the same thing. I am not sure if there is really a way around this. Something I did notice, however, was that the noise level on the gain up became much less noticeable when I started using it with my 552. I originally had a 442.

I know this doesn't help you much with a Nomad, but food for thought, I suppose.

[faxingberlin]

Is the circuit design problems? I noticed 81 48 volt electric later, no other microphone reacts so quickly. Always card to work

[studiomprd]

" Is the circuit design problems? "

IIRC Neumann, now owned by Sennheiser, still has facilities in Berlin...

you should discuss this with them (aka <cap>)

[Jim Rillie]

If you find the KMR81i needs a lot of gain, check those nasty switches. the -10dB pad may be on.

Those switches for -10 and high pass can be difficult to access.

When I used the 81s a lot I found them to have plenty of signal...

Regards,

Jim Rillie

[Scott Smith]

OK, I can't help myself-I'm starting to get like the Senator...

A quick look at the published data sheet for the KMR 81 and the MKH 60 tells us this:

Sensitivity Rating:

KMR-81i 18mV/Pa (into 1000 ohms)

MKH-60 12.5mV/Pa (into 1000 ohms)

The definition of 1 Pa is: 94 dB SPL @ 1 kHz

OK, so you don't want to do the math (neither do I these days). Go to: http://www.sengpielaudio.com/calculator-transferfactor.htm

A quick calculation tells you this:

KMR-81i = -34.89 dB (re 1V/Pa)

MKH-60 = -38.06 db (re 1V/Pa)

So, based on this information, we see that the KMR-81i is actually a little more than 3 dB more sensitive than the MKH-60.

Conclusion: There is either something wrong with your mike, or your mixer is not supplying sufficient voltage or current to the mike (the phantom supply for most of the Neumann and Sennheiser mikes needs to be 48 volts +/- 4 volts).

--S

[Jim Gilchrist]

OK, I can't help myself-I'm starting to get like the Senator...

A quick look at the published data sheet for the KMR 81 and the MKH 60 tells us this:

Sensitivity Rating:

KMR-81i 18mV/Pa (into 1000 ohms)

MKH-60 12.5mV/Pa (into 1000 ohms)

The definition of 1 Pa is: 94 dB SPL @ 1 kHz

OK, so you don't want to do the math (neither do I these days). Go to: http://www.sengpiela...nsferfactor.htm

A quick calculation tells you this:

KMR-81i = -34.89 dB (re 1V/Pa)

MKH-60 = -38.06 db (re 1V/Pa)

So, based on this information, we see that the KMR-81i is actually a little more than 3 dB more sensitive than the MKH-60.

Conclusion: There is either something wrong with your mike, or your mixer is not supplying sufficient voltage or current to the mike (the phantom supply for most of the Neumann and Sennheiser mikes needs to be 48 volts +/- 4 volts).

--S

Or the 81i's on-board 10 dB pad is engaged.

I'd suspect that before most anything else.

Happy Christmas!

Jim

[studiomprd]

"Or the 81i's on-board 10 dB pad is engaged. I'd suspect that before most anything else. "

that would fall under RTFM (yes, even for a mic) and/or operator error..??