Edwin, The Heil ProSet Plus headset (which I have) has both the HC-4 (DX) & HC-5 (Full-Range) elements. You can switch between them. The Heil ProSet comes with your choice of elements. BOTH the HC 4 & the HC-5 elements have some pre-emphasis in the 2-3 kHz range. In the HC-4, the pre-emphasis is more pronounced to give the audio more "punch" for getting through the pile-ups.
So, the short answer to your question is: No, the audio response is NOT flat, but provides some built-in pre-emphasis for the higher frequencies. 73, Ray, K9DUR _______________________________________________ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kb.flex-radio.com/ Homepage: http://www.flex-radio.com/
