[Elecraft] K3 Interior Speaker Low End Roll Off Below 400 Htz

[Dean]

My K3 is SN 3873 so it came with very good full bodied audio for the head phones. The audio out of the interior speaker rolls off below 400 Htz, and rolls off pretty hard below 300 Htz. Yes, I know that it is a small speaker but I believe that this is more than is caused by a small speaker. This restriction does not seem to be in the exterior speaker jack, or the head phone jacks.

I would like to modify this to allow the response down to 100Htz or so. Any suggestions on where the restriction is, or how to modify it?

I sometimes use my radio for casual listening from SSB, to SWL to AM broadcast, and I sometimes take it out to my shop to listen to while working. I could us an exterior speaker but in many cases, I prefer the simplicity of a built-in speaker.

Thanks for your help!

Dean