In article , Glenn
Richards wrote:
Serge Auckland wrote:

No it isn't! Your experiment is being done with dc. Repeat the
experiment with 50Hz to one bulb and 10kHz to the second bulb, both
bulbs being fed through a single amplifier and fed through a simple
capacitor or inductor "crossover". You will now see that the bulbs
don't change their brightness.

Makes no difference, AC or DC.

Do the experiment Serge described and you will find that the results show
he is correct in what he says. Then as Don has suggested, investigate
diplexing.

Bear in mind that what he describes is the kind of technique routinely
employed and studied by electronic engineers. Indeed, I'd suspect that
more than one undergrad lab may have what Serge describes as an
experiment to show this to students. It is the basis of frequency
division multiplexing in transmission line systems. :-)


Series resistance is still the same, regardless of line frequency.


Actually, not necessarily so. It is quite possible for a cable to
have a resistance that varies with frequency. :-) However even if we
ignore this, what Serge says is correct.


That experiment was to illustrate a concept, not specifics. The
principle is exactly the same.

Only for the specific case you gave. The snag is that loudspeakers aren't
simply resistors.

Slainte,

Jim

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