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Re: mic pre with headphone out

Subject: Re: mic pre with headphone out
From: Rob Danielson <>
Date: Thu, 8 Aug 2002 15:35:31 -0500
Hi Walter--
See Inserts
Rob D.

  =3D =3D =3D

>Rob Danielson wrote:
>>
>>  Hello Walter--
>>  See Inserts
>>  Rob D.
>>
>>  >Rob Danielson wrote:
>>  >
>>  >>  Hello!
>>  >>  I use an MP-2 only almost daily with phantom power mics, the noise =
is
>>  >>  very, very low.  Sounddevices.com is a small company here in
>>  >>  Wisconsin. I'm sure they'd be happy to explain their specs and
>>  >>  discuss design and performance needs. Very nice folks.
>>  >>  Rob D.
>>
>>  Walter replied:
>>
>>  >The usual quick and dirty test is to monitor it's output at full gain
>>  >while switching the phantom power on and off.
>>
>>  Tested this. I can detect no increase in system noise or introduced
>>  hum when the phantom power is switched on and off.
>
>Sounds good. Was this running with your battery pac or the internals?

battery pack

>  > Walter replied:
>>  >  Not foolproof, but a good
>>  >indicator, better if a way can be figured to apply full load to the po=
wer.
>>  >
>>  >Have you used it with rechargables? They seem to be giving 6 hours wit=
h
>>  >alkalines and that without phantom power.
>>
>>  2 hours with two AA alkalines w/phantom power on is typical.  I made
>>  a 5X1.2 D size battery sled with the Energizer Nickle Metal Hydride
>>  rechargables (D size 2200 mAh) which powers my Sony D7 DAT and the
>>  MP-2/mics for ~6 hours. The MP-2 accepts a wide range of DC voltages
>>  and the power plug locks on with threads.
>
>Ouch on the internal Alkalines, but about what I expected. Question is
>would it run at all with two internal 1800 mAh AA's?

probably.

>  Short times are
>less painful if it's rechargables.
>
>I noticed last night that Sound Devices makes a holder for the NP series
>video camera battery pacs. I use these pacs with my digital camera, so
>that may be attractive. Those are 7.2 volts and something like 1500mAh
>for the current ones. I've only got a old one here right now, and it's
>marked 1200mAh. They are also Li-ion technology. They are common enough
>that they are a fairly standard item at Radio Shack. They would be far
>less bulky than your D pac.

Good tip. those D's are ~1/3 weight of normal bats

>
>>  >Walter replied:
>>  >I've managed without a pre so far, but since I've now got the MKH
>>  >shotgun mics, I'll probably want one sooner or later. And the M/S
>>  >decoder is attractive so that I could monitor in stereo. It's one I've
>>  >been eyeing.
>>
>>  I found that a good pre made a huge difference.  I used mine with
>>  quite a few mics including  MKH-20's/30's and they seemed like a good
>>  match. The Sonic Devices MP-2's sound and features may be hard to
>>  beat for less than $1400.  Steven Feld and others love their Aerco
>>  MP-2 made by Jerry Chamkis (especially with AKG460's) but I don't
>>  think Jerry makes them anymore    Jerry says the
>>  input transformers are the key components and those prices have gone
>>  way up.  I think both MP-2's may use the same Swiss
>>  transformers,..barnd name starts with and "L," Klas?
>
>Lundahl transformers is what you are trying to remember. Yes, the MP-2
>uses them anyway.
>
>Up until this year I primarily have used the Telinga and was making
>scientific recordings. I'm now heading more into "listening" recordings
>and have obtained several new mics. The two MKH-816 shotguns could
>definitely use the help of a pre for the sort of distances I often work.
>And the MKH-80 and MKH-30 are a obvious M/S combo. So I've been getting
>used to the idea of spending a big sum on a pre, and the Sound Devices
>MP-2 has been more or less top of that list. Lang uses one and I got to
>listen to it's output and even record a bit when he was down here. So, I
>know it will work happily with the portadisc.
>
>I have noted one missing feature on the MP-2. If running M/S, it's
>decoded stereo width is made by adjusting the gain on the two channels.
>If you are running using the decoder just for headphone monitoring, then
>you could not adjust the width for the headphones without changing
>what's going to the recorder. Don't know if that's a problem or not.
>Have you played with M/S?

Yes, just starting tho. I'm under the impression that since there's
no encoding-- using m-s  monitoring is just to get an approximate
idea.  I just saturate both channels and have been able to adjust the
image with the Hyperpism plug in Peak. The WAVES m-s plug I have is
non adjustable so maybe avoid this one? But,.. m-s is a pain in this
regard because all the files need adjustments before they can be
played.


>
>I agree, a pre is pretty much essential with shotguns and such like if
>you want to record at any significant distance. The parabolic you can
>get by without it as there is a bunch of gain before the mic.
>
>>  The only portable pre that I've heard folks consistently speak higher
>>  of is the ~$1,400 Lunatec V2 by Grace Design. Apogee's Mini Me is
>>  about the same price and I believe it has USB out too.  I've read a
>>  few positive comments about the MiniMe but I haven't read of anyone
>>  comparing it's sound to the other units.
>
>Note that Sound Design has a USB pre as well. I'm not too interested as
>carting a laptop in the field is a problem. I did wonder if it would
>feed the Portadisc, which will take USB input.

maybe,.. if the HHB has the appropriate driver,..SD folks could tell
you. When I used google to look for comments about SD USB pre, I came
across some driver issues. It's supposed to sound comparable.

>  My bet is that a computer
>might be needed there as a intermediate. In any case that does not have M/=
S.
>
>Have you used the limiter on the MP-2? How much does it muck things up?


I love the limiter. You can set it to get maximum headroom and
activate only when distortion is unavoidable without it.  I set my
line iput level on my DAT (with full mp-2 output falling just below
clipping on the DAT The factory limiter now eliminates everything
above -.1dB. Like magic.  The limiter has made many tough luck
recordings much more usable-- especially when the overmod period is
short.  There's also a headphone overmod light and I've been
surprised how many times the headphone amp is actually doing the
distorting when I thot it was in the record path. But I usually
monitor the recorder.



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