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Multi-Way Conventional loudspeakers with crossovers

Introduction to designing crossovers without measurement
Introduction to designing crossovers without measurement
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Old 26th March 2019, 10:21 AM   #671
AllenB is offline AllenB  Australia
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You didn't go wrong. Third order filters are not obvious. Resonance equations may not help.

But this is a waveguide design with a 12" woofer and I guess the crossover frequency is 1k5Hz.
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Old 26th March 2019, 10:33 AM   #672
sumotan is offline sumotan  Indonesia
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Hi Allen thank you again. Seldom see the use of 3rd order XO.
I guess the best way for me know is to build the XO & get some simple equipment & software to measure & learn frm there.
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Old 26th March 2019, 10:39 AM   #673
AllenB is offline AllenB  Australia
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If you design the crossover well, it makes only a small difference between second order, third and fourth, and then only when there is a reason. For example, the order must be big enough to cut the woofer breakup and let the tweeter play loud enough.
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Old 26th March 2019, 11:25 AM   #674
sumotan is offline sumotan  Indonesia
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Understand Allen thank you again & also to Pico for the tutorial.
Will learn as much as I can.

Take care & Cheers
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Old 28th March 2019, 04:11 AM   #675
chithanhhaichau is offline chithanhhaichau
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thank you so much for sharing
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Old 3rd May 2019, 11:04 AM   #676
leo2 is offline leo2  Netherlands
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Hi Allen. When I choose a woofer which is more than 6dB below my tweeters efficiency, how
do I calculate this. In your tutorial it goes up to a difference of 6dB.
For instance when the difference is 8dB do I multiply the tweeter's impedance value by
1.4 ? Or do I have to choose different drivers.
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Old 3rd May 2019, 11:39 AM   #677
AllenB is offline AllenB  Australia
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There is no problem with 8dB. Ideally you could use an L-pad. This is one series resistor and one in parallel. Since these work in a reasonably predictable way, it should be OK to use an online L-pad calculator.
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Old 3rd May 2019, 01:39 PM   #678
leo2 is offline leo2  Netherlands
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Thanks Allen.
One question about an L-pad. Do I skip the the 10 or 20 ohm resistor from your tutorial and
just use the L-pad.?
The tweeter I want to use is a 6 ohm tweeter and with a 10 ohm resistor it will give me
3.75 ohm which I also use in calculating the second order crossover on the tweeter.
Now are these L-pad calculators designed to keep the tweeter at 6 ohm, or will it change the
tweeters impedance?
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Old 3rd May 2019, 07:06 PM   #679
AllenB is offline AllenB  Australia
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The idea with an L-pad would be to keep it at 6 ohms. Specifying this is part of the design procedure. It is also possible to take the impedance to another value but keeping it at 6 will be more likely to work as expected.
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Old 4th May 2019, 05:59 AM   #680
leo2 is offline leo2  Netherlands
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Thanks again, Allen
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