Okay, all of you bragged on the CM-500 Yamaha headsets so much that I will receive mine in the morning on UPS. Will you share some settings to get me started?? I have a bassy voice, and on my PR-40 have to REALLY attenuate the lows and accentuate highs. I will simply plug them into the rear, as you have suggested, and go from there. 73, Don, WB5HAK