Noise rejection with balanced connections is all about the electronics at either end so as long as the cable in between has 3 good conductors it won't make any difference what "quality" it is. What you're experiencing may just be a difference in these two wireless mic receivers or in the way the mic channels are processed inside the MC 6000. As an experiment connect the Gemini to Mic1 with an XLR to compare idle noise levels, and do the same with ATW connecting it to Mic 2 to compare performance. If the ATW is noisier no matter where it's connected then that may be as good as it gets.Now I'm on the hunt for a short (3 foot?) high quality XLR cable..
Bill also said the factory setting was 0 db. But when I follow the instructions in the manual to reset everything to factory default, +6db comes up. From the manual "Available choices are +12 dB, +6 dB, 0 dB and –6 dB. The default setting is +6 dB. " I wonder if they came out with subsequent manuals with a different (and more wise) recommendation.the factory 0 dB setting was way too hot