First off : please don't start a "Hifi @ssb" discussion, this is not my Intention.
I am using a Behringer Q802USB audio mixer and a Behringer C1 dynamic microphone and went for the mixer because it wasn't much more expensive than the USB Soundcard needed for digimodes.
Now i'm looking to find a way to properly connect it to the ubitx. Without modification i am sure to overdrive the mic-amp and i dont want to cause distortion or IMD.
The mixer output is 120Ohm +22dB max gain. Digimode works fine ( gain low ), mic sounds distorted even on the phones out as soon as the mixer is connected to the rig, using a 1:1 600Ohm Isolation transformer.
So - do i need to bypass the internal mic preamp to get some kind of "line in" and/or do i need additional audio attenuation ?