95neon_thumper82 Posted July 12, 2013 Report Share Posted July 12, 2013 k so as a few of you know. I built a sealed box not that long ago... it's rather GINORMOUS! 7423cu in. Type ginormous.... well i'm wanting to frankenstein this thing. a buddy put the idea in my ear and i'm like dude why not... so I look up a few port tuning softwares and web pages.... I'm liking a nice square or rectangular port. im thinking somewhere in the area of 6x6 for a nice square port.... cus it comes to about -5 inches long according to the calculators. Now the negative sign has me worried.... what does it mean? I'm hoping it mean 5 inches hanging out of the back of the box( wish is where i'm going to be putting the port. the speaker firing against the deck lid and the port firing toward the back of the back seat or to the cabin of the car as i usually keep my back seat down anyway... so help?... please clear this up for me. i feel like a ree ree <img src=http://i1332.photobucket.com/albums/w610/beastly666bassboy/IMG_9611192581855_zps9b9b76be.jpg border=0 alt= height="75" width="800"> Growing old is necessary... growing up is an option! Have fun or you might as well fall into a 6 foot deep hole. Its much easier to be smart and act stupid then it is to be stupid and act smart! You're only limited by your imagination! Stop limiting yourself! Optima yellow top6 guage cableJVC KD S36 headunitPower acoustik 1600w 750w rms @2 ohmsTwo MTX thunder 7000 10"sSealed box @4.04 ft^3Mojo Mat in the trunk Coming soon:1/0 awg cablebig 3... in 6 gauge(till i can get the money for 0)planet audio Crossover.2- 3.5's for the front.2- 6.5's for the doors2- 6x9's for the rear3- MB Quartz amps to power it all.1- 6" aeroport...soon! <p>My Log! Link to comment Share on other sites More sharing options...
slacker Posted July 12, 2013 Report Share Posted July 12, 2013 would be much easier if you just posted the outer dimensions of the sealed box for us, the type/size of sub(s) going in, and let us know about anything extra like double baffle without seeing the whole story of this, the calculator used, numbers punched in, etc, we cannot give good advice. Link to comment Share on other sites More sharing options...
95neon_thumper82 Posted July 12, 2013 Author Report Share Posted July 12, 2013 would be much easier if you just posted the outer dimensions of the sealed box for us, the type/size of sub(s) going in, and let us know about anything extra like double baffle without seeing the whole story of this, the calculator used, numbers punched in, etc, we cannot give good advice. the outer dimensions are 27"wide x 15 inches high x 23.5 deep. the double baffle is NOT FULL WIDTH. each baffle is 11 inches wide and glued and bradded in. and runs the full height of the box. the mdf is .75 inch thick too.... forgot to add that so EDIT: The box is currently in my trunk it houses two older mtx 10 inch 7000's running parallel with 750 ish watts at two ohms. the numbers i punched in were the 6in x 6in 30 hz 7423 cu in the front is double baffled for support. the joints are all reinforced twice. all of that is added on top of the 7423 for the actual useable volume. here is two of the calcs I used online. this one is for the square port that I wanted to build from scrap mdf. http://www.the12volt.com/caraudio/boxcalcs.asp#por now my buddy told me to use precision port 6" ports. so I went here and put in 7423 and 1 port 6 inches for port size... http://www.psp-inc.com/tools.htm l <img src=http://i1332.photobucket.com/albums/w610/beastly666bassboy/IMG_9611192581855_zps9b9b76be.jpg border=0 alt= height="75" width="800"> Growing old is necessary... growing up is an option! Have fun or you might as well fall into a 6 foot deep hole. Its much easier to be smart and act stupid then it is to be stupid and act smart! You're only limited by your imagination! Stop limiting yourself! Optima yellow top6 guage cableJVC KD S36 headunitPower acoustik 1600w 750w rms @2 ohmsTwo MTX thunder 7000 10"sSealed box @4.04 ft^3Mojo Mat in the trunk Coming soon:1/0 awg cablebig 3... in 6 gauge(till i can get the money for 0)planet audio Crossover.2- 3.5's for the front.2- 6.5's for the doors2- 6x9's for the rear3- MB Quartz amps to power it all.1- 6" aeroport...soon! <p>My Log! Link to comment Share on other sites More sharing options...
slacker Posted July 12, 2013 Report Share Posted July 12, 2013 ok with a 6.5 x 6.5 port of 26 inches long, you would wind up with 3.12 net cubes, at 34 hz. no idea where the negative number came from in those calcs. you don't have room to just toss in a square port and get tuning right. your best bet for what you're trying to do would be to do aero ports, if you can find a good place to put 3 x 4" diameter aero ports, with internal bends, 18" length each. that would also get you to 34 hz tuning, and 3.6 cubes. ..really is too big of a box for a pair of 10s, would be more suited to a pair of 12s. my suggestion though? get someone to design you a proper box from the ground up. someone who has some experience with this sort of stuff, not just throwing 5 cubes sealed to a pair of 10's like it's some sorta good idea. Link to comment Share on other sites More sharing options...
95neon_thumper82 Posted July 12, 2013 Author Report Share Posted July 12, 2013 ok with a 6.5 x 6.5 port of 26 inches long, you would wind up with 3.12 net cubes, at 34 hz. no idea where the negative number came from in those calcs. you don't have room to just toss in a square port and get tuning right. your best bet for what you're trying to do would be to do aero ports, if you can find a good place to put 3 x 4" diameter aero ports, with internal bends, 18" length each. that would also get you to 34 hz tuning, and 3.6 cubes. .. really is too big of a box for a pair of 10s, would be more suited to a pair of 12s. my suggestion though? get someone to design you a proper box from the ground up. someone who has some experience with this sort of stuff, not just throwing 5 cubes sealed to a pair of 10's like it's some sorta good idea. oh dude I used a calculator to get that though its an old subs. I can't find another pair for sale new anywhere. I don't know the year of manufacture. but it definitely isn't recent. I had the discussion aboutthis huge box before and the theiles are such that they aren't quite as efficient at moving air and what not as the newer subs are so the end debate was that that much air was indeed necessary for these particular subs. but I understand where you are coming from. believe me. it kind of through me when I first seen that big ass number too. lolz I'm saving for that pair of type r 15s though you better believe it:D and I'm buying them new lmno:D I'm also going to eventually be building a "proper ported box" for these subs. but till then I just want to Frankenstein this thing so I'll follow what you just said. and enjoy. this box is my first box I've built.So the moment I built it I expected that I'd be making more than just one box. for two reasons it was fun I enjoyed the process and number two I knew that being my first box I was bound to make a mistake with it, and I did. lmno. but I'll go back and reread now and get to the scratch paper and see what I can make happen thank you good sir <img src=http://i1332.photobucket.com/albums/w610/beastly666bassboy/IMG_9611192581855_zps9b9b76be.jpg border=0 alt= height="75" width="800"> Growing old is necessary... growing up is an option! Have fun or you might as well fall into a 6 foot deep hole. Its much easier to be smart and act stupid then it is to be stupid and act smart! You're only limited by your imagination! Stop limiting yourself! Optima yellow top6 guage cableJVC KD S36 headunitPower acoustik 1600w 750w rms @2 ohmsTwo MTX thunder 7000 10"sSealed box @4.04 ft^3Mojo Mat in the trunk Coming soon:1/0 awg cablebig 3... in 6 gauge(till i can get the money for 0)planet audio Crossover.2- 3.5's for the front.2- 6.5's for the doors2- 6x9's for the rear3- MB Quartz amps to power it all.1- 6" aeroport...soon! <p>My Log! Link to comment Share on other sites More sharing options...
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