"Dave Plowman (News)" wrote:

In article ,
Pooh Bear wrote:

"Dave Plowman (News)" wrote:

In article ,
Don Pearce wrote:
But being a total of approx 13k will have little effect across 150
ohms.

True - I was just trying to correct your 1.2k, which while hardly a
typo was certainly a slip of the decimal point.

No - that's the input impedance of a Neve desk - one of the classic
designs. Others too. More modern ones may be higher.

A typical modern console has around a 2k ohm impedance mic input.

Thanks for that. I did have a quick glance at some specs for modern mixers
but those I looked at seemed shy of quoting the mic input impedance.

'Rule of thumb' is to load with 10x source impedance.

Yup.

Actually, as a follow-up, following some discussion in r.a.p , my most recent
mic pre featured a modest increase in input Z to 2.5k. I note from the links
posted here that Rupert has gone as far as going to 10k now, which did
surprise me a little. I'd like to spend some time listening to the effect of
loading on various mics actually.

Graham