Is it important to chose a headphone impedance close to what the K3 would like to see? For example, Don recommended the Yamaha CM500 which, according to the website, has a headphone impedance of 120 ohms; other headphone impedances seem to run from around 32 ohms (the Yamaha RH2C) to several hundreds of ohms. Is headphone impedance a critical factor in choosing your headphones? Thanks, 73, Rich, K3VAT ------------------------------
Message: 30 Date: Fri, 12 Aug 2011 00:03:19 -0400 From: Don Wilhelm <w3...@embarqmail.com> Subject: Re: [Elecraft] Pro Set Elite w/ K3 To: Shane <software.research.developm...@gmail.com> Cc: "elecraft@mailman.qth.net" <elecraft@mailman.qth.net> Message-ID: <4e44a607.7090...@embarqmail.com> Content-Type: text/plain; charset=Big5 Shane, It is my firm belief that the audio response should be controlled by the transceiver, and not by the headphones or speakers (which should be wide-range). The more recent K3s (SN 3626 and above) contain the upgraded DSP board which has the audio Low Pass filter to roll off the AF response above 4 kHz installed. If you have an earlier K3, you can do the DSP board swap, or install the Low Pass Filter board to your existing K3 DSP board. You will find less expensive alternatives to the Heil headset in computer headsets and in the much acclaimed (here on this reflector) Yamaha CM500. I just purchased the CM500 from Sweetwater Sound for $29.95 With free shipping) - it was a demo unit at half the normal price. Heil products are overpriced for the function provided IMHO. 73, Don W3FPR On 8/11/2011 11:40 PM, Shane wrote: > The boom is something I could really do without as I'm happy w/ my > mic. I'm much more interested in the headphones themselves. I've been > reading DX books and it would seem that most headphones are designed > for high fidelity listening between 50 and 20,000 Hz. CW it says runs > from 250 - 1000 Hz and SSB from 300 - 3000. It goes on to say that > most transceivers generate white noise beyond 10000 and can be very > tiring for a listener. > > So I was wondering if these Heil headphones are more meant for this > type of application taking into account the above. > > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
