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Multi-Way Conventional loudspeakers with crossovers

port resonance above crossover
port resonance above crossover
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Old 29th November 2007, 04:05 PM   #1
i4gotmyid is offline i4gotmyid  United States
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Join Date: Oct 2006
Default port resonance above crossover

Ok, maybe this is a dumb question, but i searched and couldnt find the answer...although, I didnt know what to ask, which may have hindered my search.

My question is, take a woofer, say, scanspeak 18w8535, in a 40L ported box. If the port is set at 1", the resonance according to unibox is 3813hz. If I am crossing the driver over at 2000hz, does this resonance matter? How would this effect the speaker, if at all? According to unibox, it would pretty much be a flat response to 30hz.

I guess the question is, if the port resonance is above the crossover of the woofer does it still affect the whole speaker?
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Old 29th November 2007, 08:30 PM   #2
augerpro is offline augerpro  United States
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Depends on the roll off your using too. Also harmonic distortion can excite resonances.

1" is fairly small, I would review teh port speed at maximum excursion. Port chuffing in this case will be more audible than the resonance.
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