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Old 7th August 2013, 08:39 AM   #1
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Default Reflex Enclosure question

I've been given a few 2.1 computer speaker setups and am looking to simply replace the drivers and amplifiers with better components.

Most of the mains have either 2.5" or 3" fullrange speakers which are simple to upgrade and some of the subs have 'adequate' woofers which I may retain.

Upon stripping the devices down, I am somewhat confused, as some of the enclosures made by SAAG are bandpass constructions however the drivers are mounted with the cones facing into the sealed enclosure and the backs facing the ported enclosure (which also houses the amplifier).

Is there any reason that this would be done?

Last edited by georgewood; 7th August 2013 at 09:08 AM.
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Old 7th August 2013, 09:28 AM   #2
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Default Image of enclosure

The drivers are mounted like this.

subcase.jpg
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Old 7th August 2013, 01:07 PM   #3
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vented magnet pole piece sometimes can make a nasty noise.
by making the backside of the driver face a closed cavity it is "sealed" away.
so it reduces this noise.
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Old 7th August 2013, 02:57 PM   #4
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Quote:
Originally Posted by georgewood View Post
.... backs facing the ported enclosure (which also houses the amplifier).

Is there any reason that this would be done?
or just a simple matter of convenience, making everything easier to mount and connect
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Old 7th August 2013, 03:24 PM   #5
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Quote:
Originally Posted by Arty View Post
by making the backside of the driver face a closed cavity
I believe it's the other way round.
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Old 7th August 2013, 04:12 PM   #6
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Quote:
Originally Posted by tinitus View Post
or just a simple matter of convenience, making everything easier to mount and connect
I thought the explanation might be as simple as this ( avoid having to route and seal the driver connection wires back through to the ported enclosure ), but I was intrigued and as I didn't know, I thought I'd ask :-)

Maybe I'll just switch the driver around and seal the wire exit hole with silicon and see if that improves the overall sound.
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Old 7th August 2013, 06:51 PM   #7
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I have a feeling you won't hear a difference or if you do, it won't sounds as good. You have to think it's like that for some reason.
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Old 7th August 2013, 07:23 PM   #8
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Quote:
Originally Posted by georgewood View Post
Upon stripping the devices down, I am somewhat confused, as some of the enclosures made by SAAG are bandpass constructions however the drivers are mounted with the cones facing into the sealed enclosure and the backs facing the ported enclosure (which also houses the amplifier).

Is there any reason that this would be done?
The amplifier and speaker magnet structure radiate heat.
The port allows that heat to dissipate through the exchange of air, lowering the temperature, good for electronic and speaker longevity.
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Old 9th August 2013, 01:05 AM   #9
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Plus, both cavities I & II are tunned to a certain frequency. Changing that initial concept (by changing the position of the driver you are changing both the internal volume of the 2 cavities) can only make things worse, if they were well designed to start with. Also as weltersys mentioned already you screw the venting of the magnet/motor.
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