bunkerking09 Posted December 26, 2008 Report Posted December 26, 2008 I'm going to have 4 4" psp aero's in my next box. All 17" long. Would the displacement be ~.5 cubes? I just did a basic cylinder area formula and i got ~.125 for each one. Also, do you think that 6.5 cubes net is two big for a pair of 12's? It would be tuned to 33 hz
banginAltima Posted December 27, 2008 Report Posted December 27, 2008 Yep, thats about right for the ports. I think 6.5 cubes is way to big for two 12's. Maybe 4.5 cubes... What kind of sub are they? If you build it, db's will come... NSPL World Record Holder Trunk 0-1800 watts---147.9 with 1722 clamped watts @ 40Hz(9-20-09). Competition Only Record Holder Trunk 0-500 watts---148.1 2006 Nissan Altima 3.5 SE Currently Rebuilding.... My 150db Plus Trunk Build I do box designs. [benH] 6:24 pm: clipping doesn't really hurt subs [benH] 6:24 pm: being an idiot is what blows subs
bunkerking09 Posted December 27, 2008 Author Report Posted December 27, 2008 cool. the subs are incriminator audio death penaties. My second option is ~ 5.5 cubes tuned to 37ish hz
Decaf Posted December 27, 2008 Report Posted December 27, 2008 I think 6.5 cubes is way to big for two 12's. Maybe 4.5 cubes... What kind of subs are they? x2
Boon Posted December 27, 2008 Report Posted December 27, 2008 Depends on the 12's and what power they're getting. I did 1 Atomic AP12D2 in a 3 cube net box with 1 4" aeroport @ 29hz. It would have been louder with another aero but it was very musical and sounded good with both a 500w amp and a 4000w amp. 10.x volts fo' life!
Decaf Posted December 27, 2008 Report Posted December 27, 2008 1.8 cubes - 3.0 cubes, 20 - 48 Inches of Port, 32-37 Hz imo i would do 5cuft after all displacement, tuned to 35hz w/16sqin port for those subs
bunkerking09 Posted December 27, 2008 Author Report Posted December 27, 2008 only reason the box is so big is because i was wanting to tune it lower. I'm going with 4 4" ports for sure all at 17" long. Box will be 22 inches tall. So they're be 5" from the bottom of the box
banginAltima Posted December 27, 2008 Report Posted December 27, 2008 I think maybe you should go with 3 four inch ports and 5 cubes. If you build it, db's will come... NSPL World Record Holder Trunk 0-1800 watts---147.9 with 1722 clamped watts @ 40Hz(9-20-09). Competition Only Record Holder Trunk 0-500 watts---148.1 2006 Nissan Altima 3.5 SE Currently Rebuilding.... My 150db Plus Trunk Build I do box designs. [benH] 6:24 pm: clipping doesn't really hurt subs [benH] 6:24 pm: being an idiot is what blows subs
Decaf Posted December 27, 2008 Report Posted December 27, 2008 how much power are they getting, 1500w rms a piece or more? 3 4" ers would work well, ~37sqin port at 5cuft
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