Mounting a driver in the bottom of an enlcosure okay? - diyAudio
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Old 26th September 2010, 11:48 AM   #1
Boscoe is offline Boscoe  United Kingdom
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Default Mounting a driver in the bottom of an enlcosure okay?

Due to length of my port I can't fit the driver I have designed the enlcosure in the front, will it be okay in the bottom?
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Old 26th September 2010, 05:19 PM   #2
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It depends on the motor and cone mass. Too heavy and she sags causing permanent damage. See if you can search here or on Google, there's info somewhere on that. Either that or you rotate your cabinet so the bottom is now the side.
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Old 26th September 2010, 07:34 PM   #3
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So what is ideal THIS is a link to the driver.
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Old 26th September 2010, 07:49 PM   #4
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See what you can find here:

down firing woofer cone mass - Google Search
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Old 26th September 2010, 07:58 PM   #5
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Alternatively put a bend in the port?
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Old 26th September 2010, 09:15 PM   #6
Boscoe is offline Boscoe  United Kingdom
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Quote:
See what you can find here:

down firing woofer cone mass - Google Search
Didn't really find anything is there a way of just finding out a definative answer?

Quote:
Alternatively put a bend in the port?
I can't really it's 4" OD!
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Old 26th September 2010, 09:37 PM   #7
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Definitive answer? No, it's going to be a compromise when you go against the physics and driver design considerations (no unit is better downfiring). That being said, if it's a dual coil with only 68 gr. moving mass and an Xmax of 4 mm then you're likely to have better results than most woofers. The sag will take longer to happen and will not be as extreme but the reason I pointed you to the google search is that this is a diy site and I was trying to stimulate a bit of the diy part. You should be fine. Now can you shows us a quick sketch of what you are doing and show us why you can't make the bottom of the box, the side? ie: rotate the cabinet.
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Old 26th September 2010, 09:46 PM   #8
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I notice the driver has a low Qms. That might mean a little more sag and bit more muddy of a sound but unless someone who knows more than me steps in, I would say go ahead.
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Old 26th September 2010, 09:49 PM   #9
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Yeh here, the circle is where the driver would go but theres not enough room and the reason why I didn't want to rotate it is because the strongest side is at the bottom where the panel sits on top of the others. the box measures 400mm cubed which is 46l, the breath hole is 98mm diameter ID and is 300mm long.

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Old 26th September 2010, 10:20 PM   #10
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Default Mounting a driver in the bottom of an enlcosure okay?

Depends: http://www.adireaudio.com/Files/DriverOrientation.pdf

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