07-13-2013 09:35 AM
So how does one run phantom power to a condenser mic and still use a hard wire splitter to feed a second channel for monitor send? My GL2200 didn't really like seeing 48 volts showing up at the input. Luckily , no damage done.
07-13-2013 10:54 AM - edited 07-13-2013 10:56 AM
drop pin one (which isnt 100% preventive but usually is good enough) or use transormer splits
Agreed. Some hard wired splits have a ground lift switch next to each channel (not sure if this is for the source device or just the split side though). I'm suprised an AH GL series had an issue with it though. Most high end gear doesn't (although if you don't know for sure, It's NOT RECOMMENDED to run phantom to an input because a poorly designed board can release puffs of magic smoke this way).
If it's a problem, open the snake head and lift pin 1 on each channel (as coaster suggested). Do it at the snake head to the split (monitor) side as this will keep the integrity of a grounded shield for that short run to your monitor console. WARNING - In doing this you will no longer be able to provide phantom power from your monitor console. The logic being that usualy all channels go to FOH and sometimes monitors don't need everything (there are exceptions like click trax & audience mics for IEM's - you make the choice).
Transformers are the best way to go BUT decent ones (cheap ones will suck) are D***ed expensive.
hope this helps
07-13-2013 11:51 AM
Yup, I thought the AH board would take it to. When I powered up and checked mic I got a few warning pops and crackels. Powered down ASAP and put back dynamic mic. Ran rest of night w/o problem so - looks like no magic smoke was released. Yeah!
Until I gain more confidence/understanding of pin 1 drop, I'm shopping for a transformer splitter.
Thanks all for info.
07-13-2013 12:30 PM
There will be NO problems with a hrad wire passive splitter and phantom power with any reasonably well designed mixer. Pops and crackles are the result of a bad connaction or cable rather than the split.
That said, there can be small hums and buzzes depending on grounding schemes, that can be made worse with phantom power.
When in doubt, a transformer isolated split is the best for isolation of these problems.
07-14-2013 08:31 PM
Guess this is my week for cable isues.
Would AH GL2200 be among the reasonably well designed mixers?
System was up and running with dynamic mic on lead singer. No noise or buzz problems. Decided to try a condenser on him so...powered down and made the switch. System came back up fine but as soon as he used the mic it gave a pop and a snap and I shut her down. Switched everything back and on went the show.
Signal path was mic-mic cord-snake-spliter-mixer. Havn't had any issues with any of these-but I will be checking them now.
The snake is an older Horizon with all sheilds common - if that matters.
When I get unloaded I'm going to see if I can recreate the pop with just the mic, mixer, and splitter.
07-14-2013 08:58 PM
07-15-2013 06:58 AM
Phantom requires pristine connections to the powered devices. If you have global phantom you need pristine connections to everything getting phantom power. You pretty much have to live with crackles and pops if something isn't 100%. With my DL1608 (with global phantom) I've been avoiding having any phantom powered devices - I'm not using any condenser mics at all.
07-15-2013 09:24 AM - edited 07-15-2013 09:26 AM
I did not expressly make it clear but, I'm only using one mixer. AH GL2200. I have hard wire splits running from my 3 vox channels to 3 more channels. This gives me 3 channel strips for FOH plus 3 full channel strips for monitors - each feeding it's own post fade - post eq aux out .
Phantom is per channel.
I'm suspecting my snake at this point - I'll post when I find it.
07-15-2013 10:25 AM
07-15-2013 11:58 AM
You should have no trouble at all on the same mixer. And I'd actually recommend turning on phantom on *both* channels. Some mixers do funny things to turn phantom off, like shunt any DC to ground.
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