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Old 27th April 2007, 07:48 PM   #191
rdf is offline rdf  Canada
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Quote:
Originally posted by jneutron
If we see a measurable difference at the tweets as per my test diagram, I'd suspect image (localization) issues at best.
It's been so many years since I crunched those numbers it may have been on punch cards but your test setup will show a difference in the x-over region due the different impedances terminating the wires/wire feeding the tweeter. Again so long ago but I recall, using a realistic figure of 0.1 ohm for connectors and wire, depending on x-over order it could be in the 0.1 - 0.2 dB range, enough to potentially swamp more sutble effects.
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Old 30th April 2007, 01:59 PM   #192
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Quote:
Originally posted by rdf


It's been so many years since I crunched those numbers it may have been on punch cards but your test setup will show a difference in the x-over region due the different impedances terminating the wires/wire feeding the tweeter. Again so long ago but I recall, using a realistic figure of 0.1 ohm for connectors and wire, depending on x-over order it could be in the 0.1 - 0.2 dB range, enough to potentially swamp more sutble effects.

Ah, I'm aware of that analysis, I believe even Leseuf has that on his site.

No, my analysis is not at that frequency, but rather at frequencies far removed from the crossover point interaction.

Cheers, John
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