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downfiring sub on it's side? (pic)

post #1 of 5
1/24/04 at 3:00pm
Thread Starter 
I was going to build a 120L downfiring sub w/ 3.5-4" of space between the bottom floor but I am concerned w/ droop/sag of the woofer over time. I decided to go side firing but do not know how to protect it. I do not like the fabric look and do not want to leave the driver exposed (kids/dogs/drunks)

I have seen downfiring subs that have a piece of wood mounted on the bottom of the legs. Could I do some thing like that for a side fire? I was thinking I could use 4-6 standoffs 3.5-4" long then mount a piece of wood to the standoffs. I would have a piece of wood protecting the woofer from direct damage. what do you all think?

I can not direct link yet so cutnpaste and put www in front

dodgetrucks.org/cgi-bin/index.pl?photo=10810

Also, if you can tell from this pic I am playing w/ the idea of rubber isolating a top piece of wood so I can use this as a end table w/o my jackncoke rattling off the side.

thanks
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post #2 of 5
1/24/04 at 3:57pm
Yeap you can use a 'bottom' plate for a side firing woofer. Might just be easier to use a car audio grill.
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post #3 of 5
1/24/04 at 7:18pm
Thread Starter 
after thinking about is some more, I might just put the plate a couple inches smaller all the way around and turn it back sq. instead of diamond. or just make a cover.

is sag even an issue if i design the sub so I am 2mm or so shy of the max excursion?
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post #4 of 5
1/24/04 at 8:31pm
Sag is a function of the weight of the cone/suspension/VC/etc,

Here's the formula for calculating whether or not a driver is appropriate for downfiring.

http://www.adireaudio.com/tech_paper...rientation.htm
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post #5 of 5
1/25/04 at 7:32am
Thread Starter 
thanks. for the link.
I have decided to stick w/ the front firing just so I do not have to worry about. I am going to use the shiva or titanic ii. I know people say they are ok in df. but I think I will play it safe and if i ever want to redo my box I can later.

thanks
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