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Old 25th May 2004, 06:27 PM   #1
piro is offline piro  Israel
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Default Question about DIYing my crossover

Hi
I'm building my very own 3-way speakers (yay for me), and in the process of searching the web I found a nice little crossover calc.
here
The thing is, that a bandpass filter is shown, which means it's a 3-way crossover, but in the calculators input I'm requested to enter only one crossover point - between the woofer and the tweeter, no midrange involved.


what am I to do?
If anyone knows how to use this or could provide me with an alternative one, i will be grateful.

btw, any tips as for DIYing my speakers will be welcomed
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Old 25th May 2004, 06:43 PM   #2
qi is offline qi
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Try this one also...

http://www.bcae1.com/xoorder.htm
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Old 25th May 2004, 07:09 PM   #3
Lusso5 is offline Lusso5  United States
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All the calcs you need are there. Take a look at the schematic.
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Old 25th May 2004, 10:20 PM   #4
piro is offline piro  Israel
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Quote:
Originally posted by Lusso5
All the calcs you need are there. Take a look at the schematic.
What do you mean?
In the site I gave?


your site also gives a 2-way crossover.
my question is what crossover point should I enter in order to get the correct values for the components.

according to my site, so it seems, fif I enter one crossing point the bandpass will not allow trough any freq' higher
or lower from that freq' which, I'm afraid, means none.
(but that one specific frequency)
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Old 26th May 2004, 01:57 AM   #5
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Quote:
Originally posted by Lusso5
All the calcs you need are there. Take a look at the schematic.
Lusso5 is right. There is enough there to design a 3 way crossover - you just have to think a little. Anyway, textbook crossovers don't do the job in the best manner possible.
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Old 26th May 2004, 02:35 AM   #6
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Quote:
Originally posted by Bill Fitzpatrick


Lusso5 is right. There is enough there to design a 3 way crossover - you just have to think a little. Anyway, textbook crossovers don't do the job in the best manner possible.


Oh well I guess I'll break it down

A midrange is just simply a speaker with a low pass and a highpass inline. So you just calculate where you want the low pass...like a tweeter, then calculate where you want the low pass...like a woofer. The mix em together....order shouldn't matter (IE, the highpass will reject lows, then move to the low pass to filter out uneeded highs).
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Old 26th May 2004, 02:42 AM   #7
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guess it didn't work in last post....
Attached Images
File Type: gif bandpass.gif (5.3 KB, 197 views)
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Old 26th May 2004, 02:48 AM   #8
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Tip for a DIY 3 way: pick drivers with the smoothest widest response.
If you can use a high sensivity woofer, this will require less attenuation on the mid/hf.
I would suggest Seas ca21rex/mp14rcy/25tffc.
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Old 26th May 2004, 03:30 AM   #9
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Quote:
Originally posted by Hybrid fourdoor

Oh well I guess I'll break it down

A midrange is just simply a speaker with a low pass and a highpass inline. So you just calculate where you want the low pass...like a tweeter, then calculate where you want the low pass...like a woofer. The mix em together....order shouldn't matter (IE, the highpass will reject lows, then move to the low pass to filter out uneeded highs).
Tattle tale.
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Old 1st June 2004, 09:32 AM   #10
piro is offline piro  Israel
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Hi again.
Well, due to rhe overwelming negative replys I got about making a three-way, I'm seriosly considering turning to a more simple 2-way.
Incase I do keep the original idea what do you think of these three as a combination?

Tweeter - Vifa DX25TG05-04, 1" .
Mid - Vifa P13WH-00-08 or seas MP14RCY both 5".
Woofer - Madisounds "home brand" swan 305, 12"

or incase of a 2-way:

Tweeter - Vifa DX25TG05-04, 1"
Mid-bass Audax HM170C0

thanks.
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