I have a pair of Raal 20xr tweeters that I would like to try out in a home project. They are the multi tap/ sensitivity type. I have no equipment to measure their impedance and want a suggestion how best to attenuate their output to about 85-86 dB. They are unusual as about 3/4 of the crossover is designed into the actual tweeter leaving the user to use a capacitor to adjust sensitivity at a fixed crossover frequency of 1800 hz.
The taps are used to select the sensitivity. Using different taps presents a different load to the crossover. It takes a different value of capacitance to maintain the same crossover frequency on a different tap.. If you used a different capacitance on the same tap you'd change the crossover frequency, not the sensitivity.to use a capacitor to adjust sensitivity at a fixed crossover frequency of 1800 hz.
If you look at the impedance it is not very difficult to work with. The first thing I would probably try is using a series resistor. This also means adjusting the factory specified capacitance to work with the extra resistance.
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