Opened up an old speaker and am trying to figure out what is going on with this capacitor.
The gray cord leading to the larger 16cm speaker cone is an 8Ohm/6.3W capable load and then there is a 1uF capacitor in line with the audio-in line and leads to the smaller 8Ohm/4W speaker cone. So we should be able represent this like so:
I assume this is supposed to be a crossover filter, so a first order high pass filter. However, if we say the -3db-point is 1/(2piRC), this would be around ~20kHz. Wouldn't a tweeter want to remove anything above 20kHz, not vice versa?
This also makes me wonder about the print on the outside of the speaker box that simply states that the entire speaker box can handle a maximum of 6.3W, even though the smaller cone is only rated at 4W. Does the capacitor and the other speaker "soak" up some of the current so it's fine for the entire enclosure to be rated at a higher power?