To sperate or not to sperate - diyAudio
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Multi-Way Conventional loudspeakers with crossovers

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Old 18th March 2003, 07:42 AM   #1
ir33t is offline ir33t  Australia
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Default To sperate or not to sperate

I'm about to construct a seal enclosure for a 3 way system.

I'm conserned that the presure effect from the woofer is going to do 'bad things' to my midrange woofer and tweeter.

I'm thinking sperating the woofer from the rest of the system with a divider so that there is no "air" contact with the other drivers.

Doing this i can also 'tune' the size of the woofer enclosure to what the manufactuers recomend.

Is this a good or bad idea? help please!!!
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Old 18th March 2003, 06:28 PM   #2
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hi irt33

Yes, you should build separate compartments for each driver, or as you say, the pressure wave will cause problems.
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Old 18th March 2003, 08:11 PM   #3
ir33t is offline ir33t  Australia
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is this done in most speaker systems?

also...

The woofer is 4ohm
the mid is 8ohm
the tweet is 8ohm

whats the best way to connect them my amp dosn't like 2ohm loads.
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Old 19th March 2003, 01:51 AM   #4
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use a proper crossover network. The lowest load the amplifier will see is the 4 ohms from the big woofer.

If you thought you could get away without a crossover, sorry. You will fry your tweeter if you send it a bunch of low frequencies. Each driver doesn't just filter out its band of frequencies on its own
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Old 19th March 2003, 02:29 AM   #5
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While your at it, you might also think about constructing separate cabinets for the woofers and the other drivers, not just separate compartments.

-Joe
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Old 19th March 2003, 05:44 AM   #6
ir33t is offline ir33t  Australia
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sounds like a good idea with the sperate boxes but i would like to keep this simple and easy

Here are links to the drivers i would like to use, i know they are not brand name as such but have a look and tell me what you think.

The 8" woofer is the same exept a 4ohm version, i'm useing it as i already have them.

http://www1.jaycar.com.au/productVie...=&SUBCATID=434



http://www1.jaycar.com.au/productVie...=&SUBCATID=418






http://www1.jaycar.com.au/productVie...=&SUBCATID=383
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Old 19th March 2003, 07:46 AM   #7
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That Jaycar mid has its own sealed enclosure, as does the tweeter (which looks a lot like a set of VIFAs i have) so there is no need for you to build separate enclosures for them. The metal basket on the mid should get a layer of ductseal (or equivalent) on it to kill ringing.

dave
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