To sperate or not to sperate

ir33t · 18th March 2003, 07:42 AM

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!!!

pinkmouse · 18th March 2003, 06:28 PM

hi irt33

Yes, you should build separate compartments for each driver, or as you say, the pressure wave will cause problems.

ir33t · 18th March 2003, 08:11 PM

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.

BAM · 19th March 2003, 01:51 AM

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

redrumjoe666 · 19th March 2003, 02:29 AM

While your at it, you might also think about constructing separate cabinets for the woofers and the other drivers, not just separate compartments.

-Joe

ir33t · 19th March 2003, 05:44 AM

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

planet10 · 19th March 2003, 07:46 AM

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

18th March 2003, 07:42 AM	#1
ir33t diyAudio Member Join Date: Mar 2003 Location: Melbourne, Australia	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!!!

18th March 2003, 06:28 PM	#2
pinkmouse diyAudio Moderator Join Date: Apr 2002 Location: Chatham, England	hi irt33 Yes, you should build separate compartments for each driver, or as you say, the pressure wave will cause problems. __________________ Al I conceive of nothing, in religion, science or philosophy, that is more than the proper thing to wear, for a while. Charles Fort

19th March 2003, 07:46 AM	#7
planet10 frugal-phile(tm) diyAudio Moderator Join Date: Oct 2001 Location: Victoria, BC, NA, Sol III Blog Entries: 5	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 __________________ community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi p10-hifi forum here at diyA

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18th March 2003, 08:11 PM	#3
ir33t diyAudio Member Join Date: Mar 2003 Location: Melbourne, Australia	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.

19th March 2003, 01:51 AM	#4
BAM diyAudio Member Join Date: Sep 2001 Location: Carmel, IN; West Lafayette, IN	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

19th March 2003, 02:29 AM	#5
redrumjoe666 diyAudio Member Join Date: Dec 2002 Location: San Jose, CA	While your at it, you might also think about constructing separate cabinets for the woofers and the other drivers, not just separate compartments. -Joe

19th March 2003, 05:44 AM	#6
ir33t diyAudio Member Join Date: Mar 2003 Location: Melbourne, Australia	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