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Author Topic: What was I doing wrong?  (Read 10752 times)

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Offline philR

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What was I doing wrong?
« on: April 22, 2005, 11:27:02 AM »
so the other night i wanted to split my mic signal and run it to 2 different pre's.  i have a pair of xlr splitters that i got from leegeddy here.  and used both a v3 and an ad20.  i had no problem getting a signal on the v3 side, but the ad20 side was giving me nothing.  anybody know why?  did i need to run the ps2 on the ad20 side too?
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hexyjones

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Re: What was I doing wrong?
« Reply #1 on: April 22, 2005, 12:00:34 PM »
You should have been splitting the signal after the PS2...(if I understand you correctly)
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Offline philR

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Re: What was I doing wrong?
« Reply #2 on: April 22, 2005, 12:03:41 PM »
why is that?  doesn't the v3 provide the phantom power i need?
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hexyjones

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Re: What was I doing wrong?
« Reply #3 on: April 22, 2005, 12:06:48 PM »
You only need one phantom power source...

The phantom power turns the mics "on" - thats all you need to do...

I would seriously advise against hooking it up that way again...Does all your gear still work...?
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Offline philR

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Re: What was I doing wrong?
« Reply #4 on: April 22, 2005, 12:09:18 PM »
yeah my gear is fine.  i'm curious why you think i should have put the ps2 before my split?  if i should only be running one phantom power source wouldn't the v3 cover that and the ad20 would be fine without the ps2?

           
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Offline Brian Skalinder

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Re: What was I doing wrong?
« Reply #5 on: April 22, 2005, 12:10:36 PM »
I'm unclear on exactly what you ran.  Is this correct?

       ---AD-20 > recorder
      /
Mics < splitter 
      \
       ---V3 w/phantom > recorder

If so, yeah - that should've worked as I understand it.
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Offline philR

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Re: What was I doing wrong?
« Reply #6 on: April 22, 2005, 12:13:12 PM »
that's exactly how i ran it brian.  and yeah, i figured it should work, but for some reason it did not work on the ad20 side.
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hexyjones

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Re: What was I doing wrong?
« Reply #7 on: April 22, 2005, 12:16:37 PM »
Without the gear in front of me - I am at a disadvantage to offer an explantion why it doesnt work...the mics signal is being split before they get power...the splitters may play a role here...not sure how all these things are wired.

However - my instinct would be to power up the mics and then split the signal...

Mics > PS2 > Splitter > Downstream devices...
« Last Edit: April 22, 2005, 04:04:01 PM by corkscrew »
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Offline Stumptown Matt

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Re: What was I doing wrong?
« Reply #8 on: April 22, 2005, 03:06:32 PM »
I read something awhile back and if I remember correctly you would need to run a phantom power for each preamp.  It will not harm the mics to run phantom from two units to one mic if I remember correctly.  The original thread was concerning a comparison tape and Marc Nutter explained how it was ok to have two sources of phantom power.  The discussion was about a year or more back around the time the V3 came out.
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Offline Tim

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Re: What was I doing wrong?
« Reply #9 on: April 22, 2005, 03:08:24 PM »

whenever I've run splits I've run the phantom on both units....


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Offline philR

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Re: What was I doing wrong?
« Reply #10 on: April 22, 2005, 03:09:39 PM »
interesting.  +T's all around for the help.
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Offline MattD

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Re: What was I doing wrong?
« Reply #11 on: April 22, 2005, 03:10:46 PM »
I've also done a split with phantom on both. However you do it, keep in mind that level changes on one unit may affect levels on the other.
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hexyjones

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Re: What was I doing wrong?
« Reply #12 on: April 22, 2005, 03:25:29 PM »
Fucking craziness I say -

Power the mics and split the signal - Dual Phantom? NONSENSE!

How do you guys think this shit up! :-*

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hexyjones

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Re: What was I doing wrong?
« Reply #13 on: April 22, 2005, 03:28:55 PM »
Quote from: MattD on April 22, 2005, 03:10:46 PM
I've also done a split with phantom on both. However you do it, keep in mind that level changes on one unit may affect levels on the other.

Yah - that sounds like great advice... ???
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Offline Tim

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Re: What was I doing wrong?
« Reply #14 on: April 22, 2005, 03:30:01 PM »
the idea is that phantom power can potentially color the sound of the pre and if you're doing a comp where one or both of the units does not have it's phantom on you are not really getting a true comparison of what both units sound like under actual show conditions.
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