View Full Version : another port question

06-22-2008, 08:42 PM
i am putting a memphis 15 in the extended cab portion of my truck. I have a 95 chevy k1500 extended cab, I also have a newborn due in Sept. I want to use the entire floor as a box ( with the seat down ) and mabye build the box a little higher on one side to account for the mounting depth. My ques is how much port and the placement of the port. I am not sure which port ( circle or Squared ) would be better, or the deminsions of the port. Any help in this matter would be greatly appriciated. The sub will be firing downward , unless you guys suggest different.
aprox deminsions are 55 wide x 14.5 deep x 6.5 tall ( except on the sub side )

06-23-2008, 01:37 AM
you might just need to order a PROBOX

06-24-2008, 06:55 PM
thanks...... but I know there are alot of you guys who have built alot more difficult of a box than this.. anyone ????

06-24-2008, 07:20 PM
Nissan i have seen in other post that you have posted that you have skills in this area. AND (I will not argue if you give any advice). would you design me a box ported with the deminsions that are 55" wide x 15" deep x 6.5" tall.... adding 3.5 incheson the sub end ( to accomidate for the mounting deepth of the sub).

06-24-2008, 07:23 PM
see if you can downfire the sub. Depending on subwoofer picked it does not have to be ported...

06-24-2008, 07:55 PM
the sub will be downfired.... I am wanting it ported though... ande where to put the ports are the questions..

06-24-2008, 11:55 PM
It's make something out...
.. You really don't need ported, But i'll attempt to come to out with a ported enclosure also ( same specs )

06-25-2008, 12:00 AM
Hmm... 15" wide :wow:
... Remember you are puttin' a 15" sub in there. pushing it tight!

Also, which memphis sub is it???
Power Reference, M-Class, or Street Edge???
... If it's any higher than the M-Class, it's can't be done.

06-25-2008, 12:54 AM
This is what I can up with....
2.77cuft after sub/port displacement tuned @ 38hz


06-25-2008, 05:24 PM
yes very tight.... thanks for your imput. what are the post deminsions ? and what are the benifits of firing the port toward the end of the box? ( instead of firing it up towards the top of the cab? Thanks again your help is very appreciated. oh yea the post dosent have to be squared. i have read where poeple are putting circle ports and 90 degree elbows in boxes to extend ports... is that a bad idea? :confused:

06-25-2008, 06:05 PM
It's a personal reference...
... Some like slot, squared ports... some like the usually less resistant circle ports...
Simply up to you sir.

06-25-2008, 06:08 PM
You want the port as far away from the sub...
... Let me look where I wrote everything down ( give me a minute )

06-26-2008, 05:43 PM
on a 1 - 10 box builder i am a 6.5 or 7. i am sure i could do A square port but i think the circle port would be easier. i am just needing the specs and where to place it in the box. ( from your drawlings i am assuming that is a port opening on the end )? OH YEA THE SUB IS A POWER PREFERENCE. I like alot of the lower notes ( thats why i chose a 15 and a ported box). Thanks again you have been alot of hlep.....