Jeff,
I have a PR781 into the balanced input in back, and a Heil MB-1/ HC6 headset boom mic in the front (unbalanced) jack. The front jack has more gain than the rear jack, so I adjust the two inputs in the Mixer control: Rear balanced jack is at full gain, and front unbalanced jack is several 'notches' down. You'll see a great tutorial in the Flex Wiki on how to go through the audio chain, one step at a time, to make sure that that no single step is overdriven and clipping. Note that the "Mic Boost" in the audio tab only boosts the front jack, not the rear balanced jack. Since the front jack is already 'louder' than the rear for my mics, I keep mic boost off. Hope that wasn't too much for your head to absorb while waiting for your new Flex.
Jim KJ2P

-----Original Message----- From: Jeffrey Brown
Sent: Wednesday, May 25, 2011 1:33 PM
To: Flex reflector
Subject: [Flexradio] Balanced or unbalanced mic input

Greetings. Eagerly awaiting the arrival of my new Flex 5k. Purchased a Heil PR 781 mic and xlr yaesu cable at Dayton. I'll run it that way for awhile but I'm wondering if anyone has had success using this mic with an xlr-trs cable to the balanced input on the back? I know the front panel has more gain due to the mic preamp from reading the instruction. I don't plan to use any outboard gear so I wonder if the mic has enough gain to go straight into the balanced input on its own. Just curious if there are any advantages to doing this or not. Right now it's a non-issue but may be something I'd be interested in doing in the future if there's any benefit. Thanks.



Jeff
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