jfw5731 Posted February 20, 2017 Report Posted February 20, 2017 So I have a 2009 Mega Cab and I am in the process of installing a single 15. Just looking for some feedback on the box design. It is a slanted box of course about 4 cubes. Just wondering the input on the port. I'm leaning towards a slot port out the top. I could also fire it towards the drivers side, the sub will be situated towards the passenger side. What's everyones thoughts on this?
neuspeedescort Posted February 20, 2017 Report Posted February 20, 2017 my answer is yet another question. what 15 in 4 cubes is shallow enough to fit back there? i haven't been in but a couple mega cabs but they don't seem to have the depth for a beastly 15.
kam311 Posted February 20, 2017 Report Posted February 20, 2017 I think it's going to come down to personal preference. If it's just a daily for music I would probably do port up because I like the thought of it aesthetically it's for competition people might recommend the port come out on the passenger side with subs behind driver side. I think either way, if you can get the airspace you are set. so far... HU- pioneer DEH-P59001B Amp- crescendo BC2000D Wire- 1/0 awg welding lead Electric- Big 3 ^same wire Subs- 2 Obsidian Audio 12 d4's Box 4ft^3 ported at 33hz. designed by Ram-Designs
jfw5731 Posted February 20, 2017 Author Report Posted February 20, 2017 Its an older RE SX PRO15. They are around 9" mounting depth. Have about 10 inches to play with on the slant. I was leaning towards just doing a slot port out the side towards the driver with the sub towards the same end. Box is 48" long top is 9 bottom is 12 and 22 high. Port around 3" high and 6 3/4 wide and 11" long. About 32hertz. Box is right about 4 cubes after displacements.
neuspeedescort Posted February 20, 2017 Report Posted February 20, 2017 as long as you have room for excursion sounds like you're on the right path. i would increase the port size a little. at 3x6.75 you are in the neighborhood of 5 inches per cube. that is very low. try two 5" round ports. that nets you around 9-10" per cube which will cause far less port noise issues. that way if you want to change tuning it's as simple as sliding it out and sliding a different one in.
jfw5731 Posted February 21, 2017 Author Report Posted February 21, 2017 that's a slot port is why. 3" high by 7" wide and 11" of length in the box. It feel in the parameters for port volume and tuning? You still think that isn't big enough area?
jfw5731 Posted February 21, 2017 Author Report Posted February 21, 2017 I would have to leave one of the seats down in front of the sub to allow excursion but that's ok for me.
neuspeedescort Posted February 21, 2017 Report Posted February 21, 2017 i'm not an expert by a long shot but i will tell you 5" of port per cube is very small. if you put 1k to it, it will not perform well. it needs to breath.
jfw5731 Posted February 21, 2017 Author Report Posted February 21, 2017 yeah ok, I had my calculations wrong on the vent. It wants 78sq inches for the slot port which puts me at around the 7" wide and 11" high and 34" long. That should figure much better. Or I could do two five inch round ports like you said and would need 20"
jfw5731 Posted February 21, 2017 Author Report Posted February 21, 2017 Had the excursion inputted wrong. Was working on some eights earlier lol
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