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Re: comparing Shure modules for 183 mics

Subject: Re: comparing Shure modules for 183 mics
From: Dan Dugan <>
Date: Mon, 10 Jan 2005 21:22:32 -0800
Rob Danielson, you asked,

>I'm curious about about a
>couple of things:
>
>>Test 1:
>  >
>>Left: WR183 -> Sharp MD-MT90 gain MIC L 20, phones level 30, phones
>>output -> Sound Devices USBPre line input L, gain max.
>>
>>Right: MX183 (gain jumper +12) -> Sound Devices USBPre mic input
>>(48V), gain knob 1:00.
>
>Does this introduce the MT-90's headphone amp performance into the
>Left channel?

Yes. I tried to use the line output first, but there was no output in
record/pause. I often use the headphone output of pro-sumer gear
(e.g. Sony WM-D6C) to drive test instruments because it's low
impedance. Consumer line outputs usually have series resistors so
they don't distort when people wye L and R together.

>Would you say that the combined low noise/high output of the Shure
>mic is primarily responsible for the Sharp MT-90's internal mic
>preamp being a non factor in your test?

That's my opinion. When I saw the sensitivity of the mic, I bought it
for just that reason.

>Folks who read your
>conclusion who are using a much lower output mic like the MS-957 or
>even the Rode NT-4 (which I found to be on the order of ~18dB less
>output than the 183's) might think the MD pre isn't adding noise when
>they crank the mic pre gain to make-up for the lower output.

I have no experience with the NT-4, but the MS-957 is not only noisy
but has a lot of coloration. I've stopped recommending it to
beginners since my sweetheart Sharon bought one and we started
recording 4-channels together. It seems to have a little less gain
than its predecessor the MS-737.

-Dan Dugan


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