thats my sh1tty drawing of the new box im going to build. subs and port firing forewards into the cabin. its 37.5 wide and 25 deep and 14.5 high.
is it cool if i use half inch mdf to make the port or do i need the 3/4 inch?
also the port is 4x13 in this particular design and there is 2 inches from the back of the box is this ok? since the effective area would be half of the total area for each sub? give me your opinions on this.
would 4 inches from the back wall be plenty tho or should i strive for more? i am just going to make the port slightly external to pick up the extra spacing in the back.
do you all think with that vent area (52in) i shouldnt have any vent noise and not lose to much output?
would 4 inches from the back wall be plenty tho or should i strive for more?
four inches should be fine ive done the port width rules before and it worked but you can give it more if you want to...give it 6 for good measure it might give you more output
i am just going to make the port slightly external to pick up the extra spacing in the back.
that will be fine and ideally you want a straight port with no turns for the best output so going external a bit fixes your problems
52 inches of port will be fine
o shoot is .5 inch mdf ok to use for the port walls? or should i deffinately use .75"
if your going sub front port front ....I think that will work best then just play around with placement in the car...you can go sub back port back, sub up port up, sub forward port forward, with that arrangement
but yea thats what i plan on doing. there should be only about a quarter inch of room all the way around the perimiter of the box but i cant seal if off because i need the ability to slide it foreward to get to my spair
oh the port will be breathing alright. it is going to be facing into the giant cabin of my car and im going to make a cut through via my rear arm rest so all i'll have to do is fold down the arm rest to give it extra room to breathe. even though it should have plenty of room even if i dont do that and have the seats folded up due to the box face is going to be flat and the seat backs are at a nice angle. should have at minumun 3 inches at the top probably like 8+ at the bottom
zach the tuning on 32hz i found was with 2.5 net cubes so that would be after driver displacement.
and sean the way i position my box is the derermining factor of how i will build it. if im goin gto point the subs back then i am going to make the box narrower and taller then if i am going to point htem foreward. if i point them foreward i am going to just about completely fill up the opening under my rear support beam so that i can easily add and remove a foam sealing gasket.
ok sounds like you have your mind kinda set on firing forward but if you fire backward id make the box less tall and make it wider instead because I think the pressure will get into the cab better that way... especially if you remove your rear speakers to let the sound roll into the cab better as well
i will have the rear seats folded down most of the time to let the bass in and even if they are up due to passengers, i am going to construck a passage behind the rear fold down arm rest to allow the bass in.
i think im just going to make the box fore foreward tho. that will be my best bet i think. i honestly dont see how i could build up more pressure in the cabin if they were firing back any ways.
yea i just posted a thread on a 300M forum hopefully they will be able to tell my how to face them.
most of the people on that site have them walled off facing into the trunk and just have holes in the rear deck to let the bass pass through i dont htink that would be loud at all tho. plus my trunk lid will probably be going nuts and i am putting my amp on that so im will probably go forwards either way.
yes, on the trunk lid. thats where i had my old amp, looks very sexy imo. it kinda sux for weight tho, the lid is really heavy to lift and when idiots (99.9% of my friends) try to close my trunk they some how dont see a $300 30lb amp staring them in the face and just let it slam. i really need to get more hefty gas shocks for my lid but cant find any.
