Folks, This thread was closed this morning to limit list noise level. 73, Eric List Moderator elecraft.com _..._
On Apr 24, 2013, at 8:13 PM, "Ron D'Eau Claire" <r...@cobi.biz> wrote: > Keep in mind that the requirement is not onerous. A typical "hi-fi" speaker > is NOT needed since the KX3, like all communications receivers, is severely > restricts both the high and low frequency audio response. > > The speaker only needs to reproduce the range from about 300 to 2800 Hz > without distortion and with a smooth frequency response. > > By comparison, a minimal "hi-fi" speaker would be expected to deliver a > smooth response from 50 Hz or less to over 15,000 Hz. > > It's not just communications receivers that have limited fidelity too. Many > A.M. radio stations limit their audio response to between 100 Hz and 5,000 > Hz. Some less. But without distortion and a well-controlled response, their > audio can be very clean and pleasant sounding. > > Long ago when I worked on broadcast gear (1950's ;-), A.M. stations pushed > their upper audio response much higher. But, when FM became popular in car > radios, many customers complained that they were "noisy" with lots of hiss. > Of course that's because A.M. radios detect background static while F.M. > radios suppress such noise. A.M. car radio manufacturers discovered that > customer complaints were greatly reduced by limiting the upper frequency > response on A.M. to 5,000 Hz or less. > > I've seen similar observations by many on the reflector here who discovered > that their rig sounded much "quieter" when the equalizer was set to suppress > the upper frequency range. > > 73 Ron AC7AC > > ______________________________________________________________ > 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 ______________________________________________________________ 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
