I have a pair too. They are indeed loud and are 8 ohm impedance . I like them for cw however they get uncomfortable after a while. I prefer "around the ear" types vs. "on the ear". Steve N4LQ
On Mon, Dec 28, 2015 at 4:19 PM, Vic Rosenthal 4X6GP/K2VCO < [email protected]> wrote: > I recently started using an old set of Kenwood HS-5 phones (8 ohm) after > my cat chewed through the cord on my nice hi-fi phones. I noticed that the > audio was much louder, I presume a result of the lower impedance. I'm even > thinking about adding some resistance in series, because the audio gain is > never past 9 o'clock, even with CONFIG AFG set to LOW. > > The Kenwood phones also seem to have a much narrower frequency response > than 'good' ones. Personally I like this. > > 73, > Vic, 4X6GP/K2VCO > Rehovot, Israel > http://www.qsl.net/k2vco/ > > > On 28 Dec 2015 22:36, W2RU - Bud Hippisley wrote: > >> Perhaps this will help: >> >> Look up the specs on a good home audio amplifier — say, QSC or Crown. >> You’ll find something called “damping factor”, and it’s often 50 or >> more. Roughly speaking, it’s the ratio of the (loudspeaker) load >> impedance to the internal (source) impedance of the audio amplifier. >> So modern semi-pro and stereophile audio amplifiers are “grossly out >> of specs”, as you put it. >> >> I have a legacy, hernia-inducing McIntosh power amplifier, >> circa-1960s, with output transformers and three taps — for 4-, 8-, >> and 16-ohm loudspeaker loads. Nothing I’ve owned since then uses >> output transformers or matched loads. Most audio amplifier designs >> these days are voltage followers. Most manufacturers don’t attempt >> to match source impedance to load impedance. Highly damped output >> stages are “good” things to have. >> >> Yes, it’s true that voltage-follower amplifiers deliver more power to >> low-impedance loads than to high-impedance loads. But if I were to >> follow your line of reasoning to its logical conclusion in the home >> audio arena, I would conclude that 4-ohm speaker systems are >> sonically superior to 16-ohm speaker systems simply because they >> require more output power from the audio amplifier to play my music >> collection. >> >> Does that seem like a reasonable way to choose your stereo system >> loudspeakers? Or headphones for your K3? >> >> If your 100-ohm (or higher) headphones can’t provide reasonable >> levels of undistorted sound pressure at your ears when your K3 or K3S >> audio gain control is at, say, 9 or 10 o’clock, perhaps it’s time to >> buy a new pair of “cans”. That’s certainly gotta be cheaper than >> reverting to a 75A-4 with its audio output transformer and 500-ohm >> tap. >> >> Bud, W2RU >> > ______________________________________________________________ > 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 > Message delivered to [email protected] ______________________________________________________________ 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 Message delivered to [email protected]
