Alright, I'm just a lowly lawyer and they don't teach us these things
in law school -- or I slept through it.

I currently have a Beyer M201 mic that I understand has an impedence
of 200 ohms. I am considering purchasing another one (rebadged as a
Revox M3500) which I understand has an impedence of 600 ohms. Other
than that difference, it is supposedly the same microphone. My pres
include an RNP and a couple Symetrix SX202s. (Yes I'm a bottom
feeding home studio owner) Should the difference in impedence between
the two mics result in any significant performance or sonic
differences? Or is the only practical implication that one will
require a little more gain than the other?

Any advice (or educational explanation) would be greatly appreciated!

Thanks!

In article writes:

I currently have a Beyer M201 mic that I understand has an impedence
of 200 ohms. I am considering purchasing another one (rebadged as a
Revox M3500) which I understand has an impedence of 600 ohms.

Should the difference in impedence between
the two mics result in any significant performance or sonic
differences? Or is the only practical implication that one will
require a little more gain than the other?

It will mostly be a difference in output level of the microphones but
there may be some small difference in the character. If the Revox mic
is truly a rebadged M201 and not a microphone make for Revox, it may
be possible to change its output impedance by changing a tap on a
transformer inside. I've never been inside one, so I don't know for
sure, but it's worth a look. Otherwise, just use them as if they were
two different mics that sound pretty much alike.

Once you figure out how to take them apart (start at the XLR connector
end) you might find the wiring differences and find a different tap
on the transformer that you can use.


--
I'm really Mike Rivers - )
However, until the spam goes away or Hell freezes over,
lots of IP addresses are blocked from this system. If
you e-mail me and it bounces, use your secret decoder ring
and reach me he double-m-eleven-double-zero at yahoo

In Article , wrote:
Alright, I'm just a lowly lawyer and they don't teach us these things
in law school -- or I slept through it.

I currently have a Beyer M201 mic that I understand has an impedence
of 200 ohms. I am considering purchasing another one (rebadged as a
Revox M3500) which I understand has an impedence of 600 ohms. Other
than that difference, it is supposedly the same microphone. My pres
include an RNP and a couple Symetrix SX202s. (Yes I'm a bottom
feeding home studio owner) Should the difference in impedence between
the two mics result in any significant performance or sonic
differences? Or is the only practical implication that one will
require a little more gain than the other?

Any advice (or educational explanation) would be greatly appreciated!

Thanks!


The variance of impedance, other elments being equal, may well result in a
difference in performance and sound. You may or may not appreciate those
differences.

Regards,

Ty Ford

**Until the worm goes away, I have put "not" in front of my email address.
Please remove it if you want to email me directly.
For Ty Ford V/O demos, audio services and equipment reviews,
click on http://www.jagunet.com/~tford

In Article ,
wrote:
Alright, I'm just a lowly lawyer and they don't teach us these
things
in law school -- or I slept through it.

I currently have a Beyer M201 mic that I understand has an
impedence
of 200 ohms. I am considering purchasing another one (rebadged as
a
Revox M3500) which I understand has an impedence of 600 ohms.
Other
than that difference, it is supposedly the same microphone. My
pres
include an RNP and a couple Symetrix SX202s. (Yes I'm a bottom
feeding home studio owner) Should the difference in impedence
between
the two mics result in any significant performance or sonic
differences? Or is the only practical implication that one will
require a little more gain than the other?

Any advice (or educational explanation) would be greatly
appreciated!

I think you "understand" and "suppose" too much. I would seriously
question whether the 2 microphones are truly identical except for the
output impedance. Unless you know WHY the impedance is different, I
would assume that other things are also different, and that the 2
mikes will not be matched at all.

Norm Strong

In article PkKzb.26023$_M.105568@attbi_s54,
normanstrong wrote:
I think you "understand" and "suppose" too much. I would seriously
question whether the 2 microphones are truly identical except for the
output impedance.

I have a pair of Revox 3500 and even those aren't what I'd consider a
stereo pair. The curves are different and they sound different, much
like the differences between any two random 57s you'd find. As for
the output impedance, I don't know. I never ripped mine apart or
compared them side to side with a real 201. They do sound an awful
lot like a 201 though.

I don't think that anyone should expect any random mid line dynamic
mike to be so tightly manufactured as to be part of a gain and tone
matched pair with any other mike wearing the same label. But, again,
I found that my 3500s do sound an awful lot like a real M201, so if
it's just for multimike use, I'd ignore the differences and get on
with things.


Have fun,

Monte McGuire

Thank you for all the responses. I just got them on my office system
as my home ISP seems to miss a lot of posts (like all of the
responses). I wasn't hoping for the Revox to be a truly matching mic.
I was just wondering how different the sound was likely to be from my
current Beyer. I would be quite happy if the net result was
essentially the same as my other non-matching same model mics.

Thanks again.



On Wed, 03 Dec 2003 04:48:43 GMT, wrote:

Alright, I'm just a lowly lawyer and they don't teach us these things
in law school -- or I slept through it.

I currently have a Beyer M201 mic that I understand has an impedence
of 200 ohms. I am considering purchasing another one (rebadged as a
Revox M3500) which I understand has an impedence of 600 ohms. Other
than that difference, it is supposedly the same microphone. My pres
include an RNP and a couple Symetrix SX202s. (Yes I'm a bottom
feeding home studio owner) Should the difference in impedence between
the two mics result in any significant performance or sonic
differences? Or is the only practical implication that one will
require a little more gain than the other?

Any advice (or educational explanation) would be greatly appreciated!

Thanks!