>> >> I was very disappointed to read your post. I purchased a Proset headset >> directly from Elecraft when I bought my K3. According to Heil this headset >> has an impedance of 200 ohms. Is that why I have to plug my headphones >> into the rear speaker jack to get sufficient audio output from them? Why >> would you folks sell a headset that does not complement the K3? I am >> really disappointed.
There are two factors here. One is impedance. (The impedance actually presented by a headphone is frequency dependent and can vary widely from the "nominal" value). The other is sensitivity. I regularly use 250 ohm headphones on the K3 with no issues whatsoever. Why? They require very little drive to reach an acceptable output level. So even given their relatively high Z (compared to 32 ohms) it isn't necessary to drive the output stage of the K3 into clipping or high distortion levels to get plenty of good audio. I have a set of high end audiophile headphones with 62 ohm Z. I don't use them on the K3 (tried them once). Why? It takes a whole lot of power (relatively) to drive them to reasonable listening levels. Given the number of people who use Prosets and seem to like them just fine, I don't know why there would be any real concern or any reason to feel disappointment. Grant/NQ5T ______________________________________________________________ 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
