Up or down firing?

[LWW 10+ year member]

I have a 2001 GMC SIerra Z71 extended cab truck.

I have built 2 sealed boxes, 1 each, for 2 CDT MS-80 8" SQ subs. The boxes are .42 cu/ft and the spec is for between .25 and .45 cu/ft.

The subs will be going under the rear seat of the truck. I will have between 1 and 1.5 inches of clearance between the top of the box and the bottom of the seat.

Will I get better results by having them fire into the seat or off of the floor?

Will walling off 3 sides and leaving only the front side for the soundwave to generate forward help?

Any and all help is appreciated in advance.

PEACE

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[bigtbuck 10+ year member]

fire them down. thats what i was told to do. give about two inches between the sub and the floor, and leave one side open on the bottom so the air can move out. i did this in my 99 ext. cab and it worked out pretty good.

 

[jbl_marshall21 10+ year member]

what to u think about having them fire towards the front? thats what alot of people do. look up HLLRZR13 in the photo gallery. if u can get that to work then i recommend that.

http://gallery.caraudio.com/pp/showphoto.php?photo=1182&password=&sort=1&cat=998&page=1

theres a link

 

[bigtbuck 10+ year member]

i dont know if i'd want to do that if you have anyone sitting in your back seat. i put mine behind the drivers side, to where it would be opposite of the third door, so people would usually only sit behind it if i had many people in my truck. i hardly ever have too many people in it, and there are black scuffs all over my box from shoes and stuff. i imagine if i had the sub firing out, my passengers would be careful and try not to touch it, but either way, i think that unless you're extremely careful something will eventually happen and damage your sub