The switch allows me to silence the speaker. My solution is to open the external speaker enclosure and install a headphone jack, and a switch where it can easily be reached. Since I usually use headphones when I operate CW I need headphone jacks, too. Some radios have output jacks that will short if a monoaural (2 conductor) plug is inserted. I wire the input cord to a 3.5 mm stereo (3 conductor) plug but just wire the tip and the sleeve. Compared to the small speakers that most of our store-bought gear uses internally, these speakers are not only more efficient but they sound much better!
Most of these are 4” diameter speakers and usually quite efficient. I find an abundance of them at amateur radio swap meets where they appear to have been pulled from the older land mobile replacement programs back when they narrow-banded operation. The best ones seem to be those sold for mobile radio use. For these reasons I employ external speakers. They take up a lot of room, they are somewhat fragile, and they seldom sound very good. Very few of my home built receivers have internal speakers.
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