Fire it! Up or down?

[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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[yamaha326 10+ year member]

downfire them

 

[DwnWrdSpiral 10+ year member]

if you fire towards the floor...you are very less likely to have annoying rattles