While what you say (using the speaker as a filter) may have been advantageous in the days when receiver selectivity was "broad as a barn door". I don't think that applies today for receivers have adequate selectivity to do that filtering job. Some low end receivers that do not provide adequate filtering may benefit from a peaked speaker, but that is not true of any of the Elecraft receivers.

Besides, unless your "filtering" speaker matches the filtering provided by your headphones, there will be a vast difference when switching between the speaker and the 'phones.

In modern days, a flat speaker response in the 300 to 3000 Hz range is the best for communications. If the speaker response is greater than that range, it will not matter because the receiver will not produce audio much beyond that 300 to 3000 Hz range.

To me, the goal is a flat speaker response in the range that the receiver produces audio. The fact that the speaker is also flat beyond that range is of no consequence unless that same speaker is also used for Hi-Fi listening.


On 10/16/2016 8:17 PM, Dave Cole wrote:
On Sun, 2016-10-16 at 18:28 -0400, Don Wilhelm wrote:

In my opinion, a speaker should not "color" the audio response of the

Au contraire, the speaker is as much a part of the radio as the
synthesizer, or the APF is.  We are not dealing with a high end stereo
here, (where the speakers should never color things, but frequently do),
we are dealing with the terminal end of a communications link, which can
be several thousand miles long, and as such, the speaker is just another
filter/device to reproduce the sound.  Filters by nature color things,
hence the speaker must color the sound if we are to use all parts as
efficiently as possible.

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