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SPL & SQ / Fabrication

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

  1. Started by 1nigger,

    i just got a lightning audio storm x2.h15. v4 and ive been looking for a new recone does anyone know where i might find a new recone?

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  2. Started by SoCalSQ,

    I just received a phone call from Matt Borgardt at ID. Due to the fact that he is seriously ill, we will be unable to have the IASCA event on Jan 24th. The event will be rescheduled for some time in April. The next IASCA show will be February 15th at Beach Autosound in Huntington Beach, Ca. I apologize for any inconvenience this may cause any of you. Please try to spread the word so we don't have people driving in from out of town to show up at an empty parking lot. -Todd Woodworth

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  3. Started by ricksi30,

    So I decided to pick up another Sa10 so I can wire down to one ohm. Now I just need to figure out how to fit these in my Infiniti I30. I've always done sub back, port back but can't with the four tens. I'm thinking about doing port and subs up, I've also thought about subs up port through the armrest. I'm capable of designing and building the box, just wanted to know if anyone had any advice about the layout. Thanks -Rick

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  4. for a friend. its an explorer.. 30 deep 40 wide. and tall well that depends on how much air space will be needed for the design 2 kicker L7 15s "all black" i donno if it makes a shit i dont follow kickers. not sure where to tune it at .,. i was thinking 33 hrtz or so. sub up port up. thanks,

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  5. Started by Dammed,

    The title says it all. How much space should I have between my port and rear wall? My port will have a 9,5" x 20.5" surface area, the enclosure is 20 cu.ft., I will be using two Fi Q 18" powered by a Hifonics XX Colossus II amplifier that will deliver about 3000W rms. The reason I ask is that I don't have enough room for the tuning I want, so I want to make it as close to the intended tuning as possible. I was thinking that 8" will be enough if I make the end flared and the wall "pointy" to reduce turbulence. Would this be enough? Picture of how I was thinking about making the enclosure:

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  6. Started by stuber49,

    ok...im gettin a cae this summer...((gas mileage purposes)) and dont know really anything about doin subs in cars....ive done trucks forever and know all about them but im dumb when it comes to what cars sound good with what....so i wanna hear some opinions on what setups yall have going in cars tht put up respectable numbers thnks, zak

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  7. Started by cheese20323,

    So i am building a new box as of this moment i have 2.5 net volume without any sub displacement or any thing. The driver is 1 RE SE12 . My desired tuning frequency is around 32-34 hz. I want to know what the port diameter and length i have tried some calculators but they are to long for the enclosure.

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  8. I ordered my First 18in. btl on tuesday and i am ordering my second on friday. In anticipation I got to playing around with some designs. I am going with a wall build in my trailblazer and i got the front template all cut out perfectly today and threw it into sketchup. Double baffled 3/4in. mdf on the front and double baffle all around for the actual enclosure also " even though it is not shown in sketchup" After sub displacement it sits at 21.07cf. and no i am not counting the sub braces since i just put those in to see how i would set them since i dont have the actual subs yet. also i will be throwing in a couple of 45's to help so am i missing anything big/gettin…

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  9. Started by smagistro,

    I am thinking about getting someone to make me a custom box. Anyone know anyone that does this?

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  10. Started by ecsadler,

    i already have a btl 18 in my magnum but am wanting to add another. what im wanting is some ideas on boxes, not sure what my max dimensions are. thanks for any ideas

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  11. Started by thebiggmann12,

    hey guys, this is probably a noob question, but i have an 18" fi q in my car with the bp option. i have it hooked up to a hifonics 1610 1600watts rms, i am running about 1200 (i set it with a dmm). its in a 6.3 cubic foot box after displacement, and its tuned to 31 hz. my question is, why is it that when my doors are open it sounds alot louder than with the door shut. opening the windows helps when im driving, but its getting cold and i wasnt sure if there was anything i could do to make it loud with the doors and windows shut. any help would b great. thanx.

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  12. Started by tizzle2008,

    I was just wondering if anyone can design a box for my fi q 12 that will get low and loud. . . its for a blow through in a single cab chevy old body style and max deminsions are 48 width 17 high and 70 long. . . i just want to get something the will sound like more than one twelve back there till i get money to actually by more ill give 10 dollars pay pal for whoever does this. . . Also i heard 6th order was the way to go cause i have a 4th order right now but i made it to big so i need someone with some sense to make me a 6th BP if possible if not so input please on best box design. Thanks Everyone Thanks, Teddy

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  13. Started by john denver,

    Need suggestions on bracing for this box. Would a single 4x4 in the center of this box be enough bracing for top to bottom. I haven't added bracing from side to side or front to back yet. Total top width is just over 52 and bottom is just over 41 wide 38 deep and 18 tall designed for 4 12's

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  14. Started by sps1989,

    What is the best place to find 4" id aero ports that don't flare out past 6.75" maybe 7" that won't break the bank? What would be the best brand for the price? Is it better or easier to use schedule 40 pvc pipe or the tubes you can buy for the flares or get a whole kit? Will any flare fit pvc pipe? Would they work if the port inside the box faced each other about 16" apart, firing in opposite directions? Ps i will have 4 sa-8s in about 2.73 cubes before any displacement with about 500 watts going to each and i do not have enough room to use 6". And i want to have it tuned for daily use, anywhere in between 33-40 hz

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  15. Started by realmofexcursion,

    ok. i think i might have the box ready to go with all the deminsions. i play on putting 2 sundown nightshade 18s in my truck. i was told it need 12^2-16^2 inches of port area. so the box i came up with is 11.5 cubes, with a a port that is 33 inches tall and 5.5 inches wide, this will give me 181.5^2 inches of port area and i need 184 with the box size. its going to be tuned to 30hz. will this work out to be a good box? or do i need to do something different, just let me know

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  16. Started by Hansk,

    looking for some info on a spl ported box design for 2 15" dc level 4 or where i may look into getting one built????

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  17. Started by Cant Get Enough,

    Since I have a Ford Taurus my trunck was totally sealed and no bass would come through and had to port my seat and my deck lid and am trying to locate some speaker cloth that will let the bass to travel through without affecting airflow. Do they make this. I did try the metal mesh grill like I saw in an Overhualing tv show but found it affected bass intensity and sound quality. I am a musician and know my bassists amp has a plastic type mesh (grill) that suppesedly doesn't affect sound quality. Just wondering if anyone out there uses anything specific?

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  18. Started by 209er,

    i wanna use a 6 inch port tube going up in my car from top of box and sub facing back cup holder whole in seat.I no wat size is optimal for the 10 xcon. But how long would the port have to be. I want to tune around 30. My space to use up (32L) (14H) (14D)

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  19. So, explorers finally safetied.... Now i am going to start the box build. I plan on installing 2 15's for now, but 4 in total down the road. My question, would it be bad for the subs to oversize the box to leave room to cut in speaker openings down the road? The subs call for roughly 3.5 @ 33-35 hz, if i made the box like 12 cubes tuned to the proper frequency what effect would it have? How does the increased size effect the sound and response of the sub? Will their be any dangers in running a sub in an oversize inclosure for daily driving? Thanks in advance. Chris McDonald

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  20. the sub should be here within the week. it will be going in a 2002 cavalier. i have limits on the box, so i have come up with 36w x 17h x 13d with 2 3"ID ports tuning to 35hz. i read some where i could tune the box a little higher due to the fact i listen to a wide range of music. any truth?? sub will fire into the cab area. i have also read some where about sealing off the trunk. so, i would seal off the enclosure from the rest of the trunk and channel all the sound into the cab area?? any specifications on space needed in front of the woofer or ports??

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  21. Started by y_d0c,

    As far as sealed enclosures are concerned, I find myself to be pretty knowledgeable. When it comes to ported enclosures, thats a different story. Ive been reading quite a bit and tryin to find out how the fudge to make one - mainly the port itself and how you incorporate this with the rest of the box. When i look at ported boxes it looks likes a pucking maze and i havent the slightest clue how long to cut each piece of wood <-----thats just one of the many things im not educated on....I know about displacement and all that good stuff but still find myself extremely confused when it comes to ports....if anyone has a site i can go to and read up that would be appreciated…

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  22. Started by williampaul,

    Hi, I am getting ready to switch my system from my firebird to my truck, so I can sell the car.. It's going in a 99 s10 ext. cab xtreme.. I have 1 12" pioneer premier 3002d4, It's in a sealed box now, but I want to build a ported one for it. I will be using a precision power 1500 amp at 2 ohms, so roughly 1000 watts to it. I know how to do the wood work, but I am not near as good with calculations.lol. A good slot port box design wood help a lot, if anyone has the time. I would like it to be tuned to 34hz, with 1.7 cu without the sub. For room in the back of the truck I have 14 1/2"x18 1/2"x50".. I know thats more than enough, but thats the total space I have. Also, wh…

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  23. Started by oxsign,

    When mounting subs like this, can you make the enclosure smaller than recommended? For instance, if the subs call for 1.5 cubes each ported can you get away with making the box 2-2.5 for both? What are the (dis)advantages to mounting subs like this? Or are there any?I know the polarity needs to be reversed with the sub mounted inverted.

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  24. Started by twinkie7238,

    Vehicle: 1992 Ford Festiva System setup: 2 layers of peel and seal on the roof, hatch and entire cargo area from bpillars back... 160 amp ohio gen alternator, 950cca optima red top up front, xs 450cca in the rear... big 3 with accel 2 guage power and grounds....head unit - jvc-kd-avx2.... amplifier - atomic 1000.1....american bass 4" coax (front and rear).... subs - 2 sundown sa8d2 version1's Space to work with in hatch area:: 35" wide 12"deep 16"high material: 1" NOVA PLY goal: MECA Street 1/ 142-145 @ the headrest Car peaks out at 50 hz with mic on passenger seat, drivers door open, passenger door closed, woofer on passenger side, port on driver side, woofers and port f…

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  25. Started by anarchyaudio,

    If you had an enclosure for 2 12" subs with 2.2 cubes ea, with individual airspaces could u build a common port to split between the 2? or if you had a common port area would the enclosure have to have a common airspace for the subs as well?

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