SPL & SQ / Fabrication

I currently have 4 cube after all displacement with 43.75 sq/in of port fireimg down the middle tune @35hz. I was told that offsetting a port to any Side would raise enclosure efficiecy And get louder.how true is this? my new plan is 3.8 cube with 50sq/in of port tune @32hz with the port off set. sub are fi btl12 n2 with the mmats hd4000.05 and dc xp 270 alt x3100 in the rear xs2700 up front in a 03 impreza sealed off from the trunck.

I'm thinking about building a new box for my 15" DC level 3. My current box is slot ported to the back with the sub firing up towards the trunk lid, 3.3^ft tuned to 32 hz. I was thinking about building a box firing into the cab (BMW 330CI). Im not too experienced with building boxes but think i can manage this. Has anyone here done this kind of box before and can give me any pointers?

Hi guys, A good friend of mine want to use his Fi btl n2 15" in a new ported box. He was using mine until I sold the box. This will be a temporary setup, as he is in the process of ordering a second btl, and the box for the 2 is ready (he had 2 Xcons 15" in, before). So, the box he wants to use has those dimensions: 83 cm x 37 cm x 50 cm 32.7" x 14.6" x 19.7" Those are internal dimensions. He has 2 4" flared ports that he wants to use. What length should he make them to achieve a 32 Hz tuning ? Thanks very much for your help. I use to "work" with RAM Design for L port boxes, but I want to try the forum members for these round ports.

hey guys have 2 18" smd subs, have xtra cab f150,trying to do NW have 20d x 24h x 57w so i have 11cuft = 5.5 per sub,trying to get into the 50's but i cant seem to get there, any help appr.I have interchangeable port spl port 17x 13 thats the biggest i could fit, subs up on passenger port up on driver,double 13 ply birch all of box,running stetsom 7k2d 4xs power batts (2700's) 1 h/o alt ohio gen.4 runs 0 gauge 2 pwr 2grnd to the 3 batts in rear,should i just go for the wall? i'd get about 20 cu ft. SSNW1-2. ANY HELP THNKS

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

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

Memphis doesn't carry them in their site. Did some searching but only came up with the subs or some other t/s parameters . I doubt the place that sells them here will give them up cause they make boxes. They are kinda like that. They gave me recommended optimal. The port however doesn't make sense. I used Torres calc. To do their recommended port size. It's way too small IMO. 4ft^3 for two 12's with a port of 12x2.5x19long which tunes it to 28hz. I wanted to get what the actual T/S parameters are so I can get an accurate idea of how to build it.

A buddy of mine came to me the other day with 2 15s and wanted me to make a box that would fit in a 1999 Buick Park Ave. With a Height of only 14 inches its gowning to be a Wedge Enclosure. My ? is should i port the box in the front or in the back? The back seats do not fold down but in between the seats the arm rest folds down and gives a quick access hole that is 8 1/2 x 7 1/2 to the trunk. I was thinking of putting the port right there but im not shore. pic of trunk access hole http://memimage.cardomain.com/member_image...9377_5_full.jpg

Hey I need to. Build a new box. I have mangled one of my subs so I need to down grade to one sub. I'm wondering if anyone has Term-pak. I just need a basic box 2.5 cu/f with big port tuned 31htz if someone could run the numbers for me it would be greatly appreciated. I really miss my bass.

I found a formula that seems to work at http://www.caraudio911.com/ under designing a ported box. But I was wondering why on step four they say to subtract half the port width from the port lenght to get your physical port lenght? When I made my box I dont think that I did this so I may be building a new one if this is important. I was also wondering if this formula works or has been used by anyone here?

This H2 Hummer was at the 2003 North of the Border Bash.. it got 143db in the SPL competition.. The guy doesn't compete.. he just wanted to see where he stands in the SPL realm...

ok so i believe my sub box is about 1.08 cuft or very close to that. if i was to add this kit here... http://www.madisound...products_id=711 you think that would fit my application? in order to get 34hz with a single 3" inlet im going to need a "13.06364" long tube. if i got this kit i could cut it to length? what do you think? with a box of that amount of cuft do you guys think i should tune to a different setting aswell? let me know what you think!!

Want to build a series-tunes 6th order for a Single Fi Car Audio SSD 18. Not sure where to start I know 6th orders are more complex to design and more of a trial and error build but if I never try it out I will never learn. So of course the goal is to successfully build a 6th order but depending on the final results if it does not meet expectations there will be adjustments. Also if non of the revisions succeed I will fall back on a standard Ported Enclosure . Please if you have any useful information on 6th order designing/building It would be awesome if you can share them with me . Thanks in advancez max dimension - height 30” - depth 21” - width 38…

Info: 2-10" Alpine Type-R's in a sealed enclosure made from 3/4" MDF Volume: .882 ft^3/sub Inside dimensions: 10"x10"x15.25"/sub Outside dimensions: 11"x11"x32" Cut pieces: 2-32"x10" top & bottom 2-32"x11" front (subs will be mounted here) & back 3-10"x10" 2-sides and center divider How does this look? I assumed that 3/4" MDF is like 3/4" plywood in that the actual thickness is 1/2", or am I wrong? Thanks, Ed

http://www.power-sonic.com/index.php?id=31&gr_id=40 They use the same glass mat technology as Kinetik. I'm thinking about putting three of these in the back of my car. What do you think? Nominal Voltage........................................................ 12 volts (6 cells in series) Nominal Capacity 20 hour rate (5.5A to 10.50 volts) ................................................... 110.0 A.H. 10 hour rate (10.3A to 10.50 volts) .................................................. 103.0 A.H. 5 hour rate (17.7A to 10.20 volts) .................................... 88.5 A.H. 1 hour rate (61.8A to 09.00 volts) ............................................... 61.8 A.H…

So the plan was to build a trunk box that was larger with more port area than the box I had previously but I ran into a bit of an issue much too late in process.... After we finished the box, I tried to slide it into the trunk. Didn't fit Damn you Corolla and you're itty bitty trunk opening. Inside of the trunk would have fit it fine but it could not be fit through the opening. Sooo, I have another backseat box. LOL It sounds insanely better which is a plus, but I guess i still fail a bit in the end. It'll do for now... 4 cubes @ 31hz, 18 sq inches of port per foot. Tell me what you think. (Besides telling me it needs to go in the trunk )

I have an 02 mazda protege sedan I'm planning on making a custom kick pod out of fiberglass for my front doors. I'm going to put my hertz mlk 165 (6.5'') midbass component drivers into the kick pods. Will be ran off of an eclipse EA4100 amp bridged to 150w x 2 (for now) I like listening to rock music with a lot of bass around 80 hz. My sub is a dc lvl 4, ran off of a sundown sae1200, Right now its in a ported box tuned to 32 hz, but I'm probably going to be building another box sometime (idk what kind) what type of enclosure would be the best encolsure for my midbass drivers? I can make a sphere-shaped enclosure; does shape matter for a sealed box? while we're at it, what…

Hey guys, I'm goin g to try and build a glassed back dash to hold my mids. I was wondering if someone could give me any tips and mainly what I will need to do this. I've heard fleece, resin, and hardener. But which ressin and Hardner should I get? If I use wood to build the base should I use like 1/4 inch mdf or does it matter. Anyway, I wanted to get some of the materials today so anything will help. I'm going to look for a jasper jig so I will be back. Josh

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

Just made my first go at this google sketch up and was wanting some feed back to see if i need to make any corrections i'm building for either 3 fi bl 12's or 3 psi platform 2 12's heres a pic of what i have came up with so far

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

I am building my first box for my 4 aa's ported to around 25-28 hertz and about .75 cubes per chamber any tips its going in a 1994 gmc serria reg cab.

alright i went active last week and blew my tweeters withen about an hours play time.... maybe too much power.. maybe i had them crossed over wrong.... 100.4 sundown amp... 1st model and these ar4e my trweeters... http://www.madisound.com/catalog/product_i...roducts_id=1466 where should my settings be?

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 …