No noise canceling headphones will be effective against the high frequency noise of the KPA1500 fans. However, passive headphones can be very effective. The Radiosport makes the fans nearly inaudible. Not cheap, but neither is the KPA1500.
73, Scott K9MA ---------- Scott Ellington. K9MA --- via iPhone > On Dec 9, 2018, at 6:16 AM, eric norris via Elecraft > <elecraft@mailman.qth.net> wrote: > > I have owned a pair of Heil noise-cancelling headphones for many years. They > worked very well to reduce the noise of my old AL-1200 amplifier, and the 5 > fans on my cantankerous man-killer Henry 2002A EME amplifier. However, they > are completely ineffective against the KPA1500. I bought a pair of Bose > noise-cancelling headphones recently, and they work much better but are a bit > tinny and eat batteries. > My question for the audio experts on this list is why don't the Heils work > with the KPA1500? Does anyone have a recommendation for a pair of really > good noise-cancelling headphones with a more flat response? > 73 Eric WD6DBM > > Sent from Yahoo Mail on Android > ______________________________________________________________ > 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 > Message delivered to k...@sdellington.us ______________________________________________________________ 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 Message delivered to arch...@mail-archive.com
