I'll add my 2 cents:
1) The plug-in-power can cause a loud crackling noise when the mic
plug wiggles slightly or rotates. It may depend also on what mic you
are using, and is probably more of a problem with dynamic mics as a
variation of the resistance at the jack will cause the "plug-in-
power" voltage across the mic element to vary. Therefore, you may
find it necessary to add a blocking capacitor. I use a Panasonic FC
27uF/25v capacitor. It fits inside the XLR connector and only causes
a roll-off of 0.3dB at 20Hz measured with this model.
2) Several news reporters have complained to me that this model has
a noisy mic preamp. You will get better results with a high-output
condensor mic instead of a dynamic, but as nature sounds are often
of low intensity and need high gain, you should make sure that you
get acceptable noise results with the combination of recorder,
microphone, and subject matter. Eventually, I hope to do comparitive
measurements to quantify the problem with different recorders.
3) You may get better noise performance using a matching transformer
(200 ohm input to "medium impedance" output), but this will depend
on what input impedance the mic preamp is optimized for (which I
haven't myself tested). Most consumer mics that would accept plug-in-
power are likely to have a 600 ohm output impedance, which may be
why (combined with the crackling problem) they recommend these mics,
even though they are unsuitable for professional use.
- Adam Liberman
Liberman Sound
Thanks,
Adam
--- In Vicki Powys <>
wrote:
>
> Can anyone confirm if the Sharp minidisc MD DR7 (which may also be
listed as
> DR480) will only accept microphones that use plug-in power? The
manual
> suggests using only "mics that can be powered from the mic
socket". What
> would happen if you used a battery-powered mic such as a
Sennheiser K6
> series mic?
>
> Vicki Powys
> Australia
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