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dual boxes or one big box?
dual boxes or one big box?
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Old 2nd December 2017, 11:22 AM   #21
ctrlx is offline ctrlx  United Kingdom
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here's a test you can try if you currently have two drivers in one box - feed them with a low frequency (10Hz) and observe what the drivers are doing.
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Old 2nd December 2017, 11:55 AM   #22
wintermute is offline wintermute  Australia
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dual boxes or one big box?
Not a sub, but this is how I did it for my MTM.

Click the image to open in full size.

I figured that each driver being in it's own volume removed the possibility of any modulation of the cones from each other (from the inside) and that this is diy so if you can why not, as there didn't really seem to be any downside to doing it. I also figured that it meant that I didn't need any other form of bracing

One possible disadvantage would be the closer proximity of panels to each driver that the partition(s) introduces.

Tony.
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Last edited by wintermute; 2nd December 2017 at 11:56 AM. Reason: minor edit.
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Old 9th December 2017, 01:15 AM   #23
globalplayer is offline globalplayer  Germany
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2 enclosures.
Placement, stability, easier to transport/hide, sound, ... plus If you go ported and kill one driver you still have one full functioning unit left.
For a compromise maybe 2 chambers in one enclosure.
2 speakers playing in one chamber will always sound "bad". They will never be exactly the same and therefore there will be cancellations and phase problems plus distortion from reflecting waves inside the chamber reflecting back unto the cones. Damping will help but anyway it is not optimal.
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Old 9th December 2017, 01:20 AM   #24
planet10 is offline planet10  Canada
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dual boxes or one big box?
Quote:
Originally Posted by globalplayer View Post
2 speakers playing in one chamber will always sound "bad".
Not my experience. My sealed push-push woofers set a high standard of quality.

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Old 9th December 2017, 02:12 AM   #25
globalplayer is offline globalplayer  Germany
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Maybe the TSP are very close.
And even then seperate enclosures will still sound better.
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Old 9th December 2017, 02:46 AM   #26
planet10 is offline planet10  Canada
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dual boxes or one big box?
I beg to disagree… push-push woofers largely takes the box and reaction forces out of the equation.

dave
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Old 9th December 2017, 11:14 AM   #27
globalplayer is offline globalplayer  Germany
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Now I get it. Drivers are opposed to each other. Well then it could work.
Sorry for my ignorance.
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Old 24th February 2018, 07:55 PM   #28
spandrel is offline spandrel  United Kingdom
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I seem to remember that putting two speakers in one cabinet increases the cutoff frequency, presuming the same size cabinet. They are in acoustic series, is that right? And acoustic parallel lowers the cutoff (face to face, cross wired). I've lost all my speaker design stuff, lent it out to someone, so apologies if this makes no sense.
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Old 24th February 2018, 10:05 PM   #29
planet10 is offline planet10  Canada
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dual boxes or one big box?
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I seem to remember that putting two speakers in one cabinet increases the cutoff frequency, presuming the same size cabinet. They are in acoustic series, is that right?
That is true. Exactly like putting one driver in an enclosure half the size.

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