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ok we are still talking about doing the two 15 with the four amps right and a total box volume for both subs being 6 or 7 cubes or 6 or 7 cubes per sub??

also with the port being 17.31 x 4 x 6.53 isnt my port 452 cubic inches?

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also with the port being 17.31 x 4 x 6.53 isnt my port 452 cubic inches?

port area is measured by the port width and height, not depth.

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how many cubes would you say for the three 9 or 10

yea, around that, but then youll need to account for port volume and sub displacement too. not enough room from you measurements you already put

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yea, around that, but then youll need to account for port volume and sub displacement too. not enough room from you measurements you already put

the measurement i put the first time are using 1" MDF if i shrink that to 3/4" minus sub and port displacement i get 11 ft3 and using the 3/4 i will fiberglass the box with 29 oz mat to compensate for the thickenss and also the front and top of the box will have a secong sheet on those to flush mount the subs a little bit.

edit: with sub displacement i have 10.28 ft3 have yet to calculate port

Edited by o8mustang13

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Do 2 15s in 8 cubes net with 130 square inches of port tuned to 35hz. WANG.


Former USAC Director

MECP Certified First Class of 1997

First car in the world to register 150db from the dash and sealed, in the trunk of an escort, with 2 10 inch subs. In 1997:

http://audioforum.termpro.com/cgi-bin/ubb/ultimatebb.cgi?ubb=get_topic;f=51;t=002600

Just my part in the modern development of SPL competition:)

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Do 2 15s in 8 cubes net with 130 square inches of port tuned to 35hz. WANG.

I was hoping to get it tuned to 30Hz

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you could go down to 3 cubes per sub, if you want to do 3 subs. but make sure you can have a good size port too.

also, dont just brace you box with sheets of fiberglass, you need some threaded rod or some other kind of cross bracing

Edited by fritosaregood

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