> Actually, 100 uF into 32 ohms gives 50 Hz bandwidth at -3 dB. Into an > 8-ohm load you get 200 Hz at -3 dB, still fine for a voice signal > although marginal for music.
Right, nearly 200 Hz on the money. I think you're trivializing the difference between 200 Hz and 100 Hz with voice, not just music. If a transmitter is capable of transmitting down to 100 Hz, the ear can hear substantial difference between those two extremes. Arguably, we can say that all we really need is 300 Hz or even a bit higher for maximum articulation. But, I'm discussing headphone circuit improvements primarily for AM as well as ESSB. > If you want better low-frequency response, just stick a resistor in > series with the speaker. No doubt, as long as the output is not already volume-starved. Also, another benefit of a low-Z source is the higher damping factor involved into low Z. Adding pure series R to the output kills that attribute. Paul, W9AC ______________________________________________________________ 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
