I didn't mean to stir up yet another controversy. I use Heil Proset with my K3 and they work just fine, as do my Yamaha CM500. The K3 can easily drive high-impedance headphones.
My point was simply that *if* you have to crank up AF gain to the point of distortion to get sufficient headphone volume, and *if* you are using high-impedance headphones, *then* the problem *may* be related to the headphone impedance. 73, Lyle KK7P ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html

