[Top] [All Lists]

Re: MKH 8070 long shotgun

Subject: Re: MKH 8070 long shotgun
From: "Avocet" madl74
Date: Tue Jun 21, 2011 3:19 am ((PDT))
> Instantly upon plugging it in it sounded noisy.
The switching channels between the MKH 40 and MKH 8070, I could hear
increased hiss with the MKH8070 ( a mic that is supposed to be
quieter ).


Could this be an impedancce mismatch? We all assume that "200 ohm"
input and output impedances are all the same but they aren't. Also the
"noise impedance" for minimum noise is often not linear with
frequency. This is a different parameter from "matching impedance" and
some mics specify a higher input impedance than the nominal 200 ohms.
The 8070 is 25 ohm output but specifies a 2000 ohm input impedance.

The power spectrum of my MKH mics have a tipup at the upper end which
is getting close to thermal noise. I can spot this on many recordings
where the noise is inaudible. Can you do a power spectrum of the 8070
noise or post a noise recording so I can compare it?  I record HF
noise with the mic under a pile of bedclothes.


David Brinicombe
North Devon, UK
Cogito cogito ergo cogito sum - Ambrose Bierce

<Prev in Thread] Current Thread [Next in Thread>

The University of NSW School of Computer and Engineering takes no responsibility for the contents of this archive. It is purely a compilation of material sent by many people to the naturerecordists mailing list. It has not been checked for accuracy nor its content verified in any way. If you wish to get material removed from the archive or have other queries about the archive e-mail Andrew Taylor at this address: andrewt@cse.unsw.EDU.AU