Mic splitter Y cord

Bob Simpson · Post by **Bob Simpson** » Thu Mar 24, 2011 11:02 am

I need to split my drummer's headset mic to a separate channel on the recorder and our FOH board.

Will a XLR Y cord work, or will the impedance get wierd and foobar the track?

I'm short of cash to do an iso splitter.

Any suggestions?

TIA

Bob Simpson

Scodiddly · Post by **Scodiddly** » Thu Mar 24, 2011 11:33 am

A simple XLR Y-cable will work 99.99% of the time. Go for it.

IanWalker · Post by **IanWalker** » Thu Mar 24, 2011 8:57 pm

Scodiddly wrote:A simple XLR Y-cable will work 99.99% of the time. Go for it.

Yup, unless you need to run phantom from one of the split ends. You can get some crap then, and might get some phantom running back down the other side of the y.

Or at least that's the idea. There's a reason they make splitter boxes with direct and isolated outputs.

But if its a dynamic (or if you're splitting after some kind of preamp)? Go for it.

Scodiddly · Post by **Scodiddly** » Fri Mar 25, 2011 10:59 am

It will work 91.34% of the time with phantom involved.

IanWalker · Post by **IanWalker** » Fri Mar 25, 2011 11:01 am

Scodiddly wrote:It will work 91.34% of the time with phantom involved.

Its good to know the exact percentage of the time that it will. Science!

Bob Simpson · Post by **Bob Simpson** » Fri Mar 25, 2011 1:13 pm

IanWalker wrote:
Scodiddly wrote:It will work 91.34% of the time with phantom involved.
Its good to know the exact percentage of the time that it will. Science!

Thanks, Folks...

Seems like I remember 93.675% of all statistics are made up on the spot...

Bob Simpson

Andy Peters · Post by **Andy Peters** » Wed Mar 30, 2011 9:35 pm

IanWalker wrote:
Scodiddly wrote:A simple XLR Y-cable will work 99.99% of the time. Go for it.
Yup, unless you need to run phantom from one of the split ends. You can get some crap then, and might get some phantom running back down the other side of the y.

Doesn't matter, unless the other input on the split cannot stand off the 48 V phantom (which will actually be lower than 48 V because of the load presented by the mic), in which case the other piece of kit is crap and needs to be replaced.

Certainly the DC bias from the phantom will be seen at the other input, but in a properly-designed system it'll be blocked by either caps or a transformer.

And there's no need to worry about phantom active on both split ends since the 6.81k resistors do a fine job of isolating the voltage sources.

-a

Bob Simpson · Post by **Bob Simpson** » Fri Apr 01, 2011 12:30 pm

Andy Peters wrote:
IanWalker wrote:
Scodiddly wrote:A simple XLR Y-cable will work 99.99% of the time. Go for it.
Yup, unless you need to run phantom from one of the split ends. You can get some crap then, and might get some phantom running back down the other side of the y.
Doesn't matter, unless the other input on the split cannot stand off the 48 V phantom (which will actually be lower than 48 V because of the load presented by the mic), in which case the other piece of kit is crap and needs to be replaced.

Certainly the DC bias from the phantom will be seen at the other input, but in a properly-designed system it'll be blocked by either caps or a transformer.

And there's no need to worry about phantom active on both split ends since the 6.81k resistors do a fine job of isolating the voltage sources.

-a

Where do the 6.81k resistors go?

I was just planning to parallel the conductors...

Bob

Nate Dort · Post by **Nate Dort** » Fri Apr 01, 2011 12:54 pm

Bob Simpson wrote:
Where do the 6.81k resistors go?
I was just planning to parallel the conductors...

Bob

they're in the mic pre. conventional phantom power design requires a 6.81k resistor in line with each signal pin. nothing you have to worry about with your splitter cable.

Bob Simpson · Post by **Bob Simpson** » Fri Apr 01, 2011 4:02 pm

Whew!

Thanks, Nate.

I knew I should put resistors in for a combiner, but didn't think I needed them in a splitter.

Bob Simpson

dix · Post by **dix** » Mon Mar 05, 2012 5:20 pm

I have a Rapco signal-combiner, but I now have a need for a splitter. Would gender-reversing the inputs and outputs on the combiner be the same as using a splitter? ?i will need phantom to go to the mic.

Thanks!

vvv · Post by **vvv** » Mon Mar 05, 2012 10:05 pm

But mebbe make sure his headset mic's not a ribbon ...

... or not.

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