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SPL & SQ / Fabrication

Calculations, Concepts, Designs, Theories. All General SPL Or SQ Questions Can Be Discussed Here.

  1. Started by SKEEMASK,

    Ordering a AudioControl DQXS digital processor sometime in the near future. All the speakers I have are in my sig. I need suggestions on where to place these bad boys. Two 6.5"s are going into the bottom of each door. for the 4s and tweets do u fellas suggest I do 1. midrange/tweets in doors and a-pillars. 2. doors and kicks 3. kicks and A-pillars note: each 4 will have a tweet right beside it, so it wont be off axis

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    • 8 replies
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  2. Started by teamsolo,

    i got a box that is 40x32x17 and trying to tune it to 32hz can someone help me find how big i need the port hole

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    • 8 replies
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  3. I have a crown xls 1000, puts out 1100 watts bridged, had two 15s in room, sold them. Just ordered a 12" Icon. I would like to build a ported Enclosure. Can anyone help?

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    • 7 replies
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  4. Started by QuestionMan,

    Yes, i've used a table saw before, before anyone asks lol. But never for a box with mdf. The table saws i've used have always been pretty big, like shop table saws. I recently borrowed a 10" table saw from a buddy who builds boxes with it, but it's small as hell. It's really small, especially for the box i'm making (the biggest sides are 39.5"x21"). I even put tables on two sides, to help support the wood as it goes along the blade. I used a circular saw to make the mdf as small as possible for the saw, cutting the 4x8 in (about) half. Everytime i take a piece across, it kicksback pretty bad. Now i know i'm not the first person to use a small table saw for a big project,…

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    • 4 replies
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  5. Started by puscifer2,

    This is my first go at trying to design a ported box so just want to make sure I got the numbers right. This is for a coworker. The sub is a DD 9515. According to their site it should be 3 cu with 48"^2 of port. Here's what I came up with: 24" x 22" x 15" and the port 3 9/16" x 13 1/2". If I follow the "rules" and make it 20" long it'll be 38ish tune. I appreciate any input you can give. 15" height is to keep it under the window line and cannot be modified. Other than that any suggestions welcome!

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    • 4 replies
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  6. Started by needmobass,

    I lined my box with fiber glass and mat, and it came out very bumpy, tried to smooth it out and did an ok job at removing some. My question is how smooth does it have to be, does it affect the over all sound pressure.

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    • 7 replies
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  7. Started by Lschevy,

    Im starting my build in about a week or so and i narrowed my design down to two options. The first option is to have the sub up firing at the rear deck with a kerfed port(s) firing back or sub up firing at the trunk lid with a kerfed port(s) firing into the cabin. after doing a lot of searching i see a lot that like the sub up port back. The reason i chose these two designs is because i cant do both sub and port back or sub back and port to the side. Which option would yield better results? I also its vehicle dependent but my box will have to be build inside the trunk so moving it around is pretty much out the question

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    • 7 replies
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  8. I started a wall and need to know what to tune the box to... Any help would be greatly appreciated.

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    • 8 replies
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  9. Started by codester,

    Been awhile since Ive been on here but I Just purchased back my 2x 15" SSA Icon subs I first purchased around 11 years ago. I have/ had them in a 7.2 cubic foot box net tuned to 32 and it sounded great on the bass music and rap/ hip hop I used to listen to but not amazingly accurate/ punchy on rock, etc. Im looking to only use one of them in my 2010 Ram 1500. I currently have a 10" JL W7 in a sealed box in the truck and it sounds great and I love it but doesn't quite have the output Id like and planning to put 1 of the Icons in the truck. Im considering either Ported or sealed. I now listen to mainly bands like chainsmokers, club music, alt rock, heavy…

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    • 2 replies
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  10. Started by Curtis96olds,

    i will be running 4 skar 10's, the box will be in an extended cab dodge dakota, the rough dimensions of the box will be 48" wide, 26" tall, and 15" deep, subs will be on top. now i know if the subs were on the front pannel i would double baffle because of the amount of surface area there is on that panel, but if the panel the subs are on is only 48"x15" would i really need a double baffle? i mean of course i will brace is with allthread or wooden dowels, but i dont want to double baffle if i dont need to, mainly becase that would require me buying an additional 4x8 sheet of mdf.

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    • 9 replies
    • 1.2k views
  11. Thought I would post this little bit of theory that I discussed with Mattdog from Neons.org tonight. I would like to see if anyone has anything to add/discuss further? Typical 4ga stranded copper wire has approximately 0.000292/ft of resistance, so for a typical 20ft run of wire to the trunk, that equals 0.00564 ohms. Pretty much negilible, the fuse will have more resistance . A battery like the Optima Yellow Top runs approximately 0.0028 ohms of resistance. Battery resistance changes with temperature, but in the case of a gel-cell deep cycle, that battery temperature will be more stable than the typical lead-acid during use. Deep cycle batteries also have less resistanc…

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    • 3 replies
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  12. Started by subwoofery,

    Hello, I was wondering whether it was possible to use two different port length on a same box: For example I need 31.5 inch of port length total for 2 x 3" round ports. Can I make one 14" and the other 17.5"??? It's just that it is quite difficult for me to fit those two ports inside the box, outside would be possible but aestethically wouldn't be good. Thanks guyz, Kelvin

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    • 12 replies
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  13. Started by zdoc,

    Any advice on doing an external port, like how to attach it and are there any negatives to doing this? Im planning on getting 2 sa-8's and putting them under the back seat of my 03 extended cab 1500. I will have the port coming out the side of the box under the seat as well. I plan on making it so I can remove the port to exchange with others, really just to see the difference and also because of size restictions. Box will be 2 cubes after sub displacement, so I will probably do a 5"x6" port 32.5 inches long for 33hz tuning and another one fro 38 or 40 hz. Thanks for any input guys.

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    • 13 replies
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  14. Started by SEBASTO,

    heya... i would like to know how close can a sub(magnet) come the back side .... ..(if the sub is 10" ... can the depth of the box be 16 > or if the sub is 18" ... can the width be 19" ) ...can it effect the sound ..?

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    • 11 replies
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  15. Started by Splchaser,

    I need a good set of box plans drawn up i have no problem building them.....just a noob at designing them i have all the t/s parameters ect... im really looking for a burp box i alreay have a daily box that does decent numbers on the TL ....just need something designed for the TL....Let me know if you can help me out. Thanks....

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    • 2 replies
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  16. Started by sick1166,

    15"sa sundown d2 on 1200 watts All the sites for box sizes and calculators I just cant seem to come up with the proper size port and so forth I have all the room I need but everything says I need a bigger box with that 1200 watts running 1 15" any ideas or help sizing, thanks my 1 size was 33 x19x 17 3.5" port width 11 1/4" by 15.5" 3.7 cubes @ 32hz looking to stay around 32hz any help on proper box size is appreciated

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    • 1 reply
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  17. Ok I got my new install done which consist of 2 15 xcons facing cabin in a sealed box, ran off a crescendo BC 3500. My question is will it be a significant gain in output if I go with a ported box instead. Only reason we went sealed was shortage in trunk space given space we had enough for opt sealed enclosure. Any info?

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    • 10 replies
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  18. Started by Hzd Skizzy,

    Hello, I am building a box for a friend and I had my MDF all ready to cut, measured out panels and everything and he calls and tells me that he want an aeroported box. I have searched and read different things in this section and after figuring out slot is actually a lot more different than aero ported, I just don't get it. So, I have come for some box designing help. Dimensions: Depth: 16 Height: 16 Width: 40 It is for an Fi X 12. Was hoping for 2.0ft^3 at 32hz I really just need to know how many flared aeroports I would need with no port noise. Diameter and Length of the aeroport would be nice. Thanks in advanced, Jay

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    • 6 replies
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  19. Started by loud lincoln,

    anyone in here ever deal with Digital Designs or have a few M1 amps layin around?

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    • 8 replies
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  20. Started by djjdnap,

    Jl audio it's interactive

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    • 5 replies
    • 1.2k views
    • 1 follower
  21. hey, im going to be buying a VW rabbit in a couple months cause i got accepted to my #1 choice university!!!! i got a scholarship so now i have about 10 grand saved up plus i'll take out a student loan and im gettin paid to go to school (1600 bucks a month). I currently have a Fi Q18 tuned to 28-30 hz, and i hit 145.2 on my first try with some music. Im looking for some help on deciding what the best setup would be for a hatchback. Im thinking 2 12" BTLs with about 5000 watts. im really excited to get this project goin. my goal is to break the 150 mark but music is what the stereo will play, no farting. any help is appreciated!!!! thanks

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    • 8 replies
    • 1.2k views
  22. Started by mwerling1212,

    well tomorrow my third rl-p 18 should be here, so now i need to start doing some box planning. i have an isuzu rodeo (suv) with the back seats ripped out. im going to use the whole back portion to build the box. its not going ot be a wall though. my question is what size and tuning should i do for all three? i see the recomended 5 cubes at 27 hz for one, but im not sure if it would change for all three. by that i mean, would the optimal size be 15 cubes at 27 hz? maybe im overthinking it but it seems ike it would change due to there being multiple drivers in the same box. also, i know i can fit the box in my suv, but porting it back may not work. my back window angles in …

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    • 4 replies
    • 1.2k views
  23. Started by jdawgg22,

    hey, i am familiar with both ported and sealed boxes. but im not sure what is better, i know that ported boxes hit cleaner and i know ported you will have more spl. but i heard that with ported you get cone distoration and the sub hits sloppier. im just wondering what your specs are? thanks

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    • 11 replies
    • 1.2k views
  24. Started by dragon123443,

    do aero ports have to be straight or can they have an elbow somewhere in between .. also when designing a box with an aeroport does it need 90 on the edges ?

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    • 10 replies
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  25. Started by Garrett Tait,

    i had a rockford fosgate t1d415 before and ive been messing around with custom boxes for a little while. i didnt know too much about winisd back then. luckily my first box i built for it played very nice and didnt have any port noise. i tuned it around 34hz if i remember correctly. i loved how low it could get down. i played into the lower/mid 20's (i know i was playing a bit lower than the tuning freq) and loved it. this time around im going to design a box for my fi sp4 15. it should be here any day (i hope) and i'd like to be tuned low. heres my current design for it. can you guys let me know if my design is ok. i know the port is a little skinny but it looks like the …

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    • 15 replies
    • 1.2k views

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