SPL & SQ / Fabrication
Calculations, Concepts, Designs, Theories. All General SPL Or SQ Questions Can Be Discussed Here.
2,714 topics in this forum
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Plan on running a pair of M1a's strapped @ 2 ohms for daily/bassrace, and @ 0.5 ohm for burps. Just under 3 cubic feet tuned @ 38hz 72.5 sq in. of port Does it look adequate?
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As the topic says. I need to know can't fid it anywhere.
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hey i wanna enter iasca rookie competition but the sub im using is a 15" atomic apspl15, in the category im only allowed 1 4" aero port, what size box should i use and what length port, the car is a mazda protege5, right hand drive cause im from trinidad, the amount of power is 1500 watts, the box will have to make high spl while playing music since in this category you are only allowed to test with music
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- 5 replies
- 792 views
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this box im making for my ta is a PITA. having to make all sorts of corners and angles to utilize every inch of space in my well. coming along good so far, i've got the bottom half done, and im coming to where it angles and comes to the top of the box. how do i go about screwing in the angle? do i just countersink it further in on the outside of the box, so it doesnt poke out under the carpet, and put the screw in at the same angle as the wood?
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Ok, this is giving me a headache... I dont know the exact volume of the box but it's somewhere between 12-13.5 cuft NET or it should be... This is what i've got and cant figure out why... I had a port 25.5" long that peaked at 50hz. I then had a port 22.25" long that peaked at 51hz I then had a port 20" long that peaked at 52hz I then had a port 18" long that peaked at 53hz I then had a port 16" long that peaked at 54hz The port extends through a double baffle (1.5" thick) and sticks out of the box 5" I always cut off the port length on the INSIDE of the box and retest. My peak frequency is 50hz. My LOUDEST port test was at length - 20" which peaks at 52hz but is loudest…
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Anyone ever used plum ceek Mdf to build a box out of? I was thinking of trying some.
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so ive built a few boxes before an they were simple an nothing special so i use a box calculater that i no longer have( computer crashed)! so im trying to build a box for this 15 btl fl to go in the hatch back of my 1982 mustang! i found a new box tuning calculater (torres) from smd site it has the height 1 an 2 an depth 1 an 2 so i figured hey it will work but it doesnt for me..it messes up an doesnt add height 2 in so i makes it just a square box i wana do 21" tall front 13.50" tall in back 17" deep an 35" wide.. with them specs i want sub up flush mounted an the port would have to go forward towards the top of the box! if that makes since.so THE would make the inside …
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Okay, I will be finished up my box tonight and had a few questions before I close it all up and get it hooked up. *I've seen online that it says to put weatherstripping around the hole for the sub before putting the sub in the box? This true? *And I've seen people use resin on the inside or their boxes to help the structure? This true aswell? Thanks for the help and thanks to everyone that has helped throughout my first build!!
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- 789 views
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what you guys suggest? i mostly hear 2.5 net for the 12. power is 2 kx1200.1's strapped, so at least a good 2400w rms. ive already taken all the measurments and everything, this is about 3.8 gross, so i may shorten it a little, leaving me more room for amps on the top. port- what should i tune to? its for rap music. slot? aero? heres sorta what its gonna look like. the yellow will be double 3/4"
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- 4 replies
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Alright, so my boss finally warming up to the idea of making a wall in his Cavalier for our shop demo car! Now, this isn't 100% going to happen, but I'm excited and want to be ready for when he decides. I know this place has a ton of knowledge, plenty and plenty of people who have made walls. I guess I'm looking for just general rules and/or tips to make sure it will turn out well. Iv decided just to make a normal, flat and vented wall. Leaning towards 4 15's with a nice big slot port on the drivers side. Any tips are welcome of course, thanks guys!
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So my brother keeps telling me that even if i port my box that it will have no effect on how loud it will be, because it is in a trunk and that the only way i will tell teh diffrence is if i have a suv or fold down seats I know this is not true, but to an extent it kinda makes since
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Im needing help i only have a phone no computer and I'm wanting a box built for my new soundquebd hds3 12's i got two subs and my dimensions are 30" deep 35"widr and 18"tall wanting it tuned low around 31-30hz I'm also wanting subs on top facing the roof and port facing the back hatch I'm using a 1200.1 super d class mono Zeus amp with big 3 upgrade and 0 gauge wires but I'm unable to access these sketch up things and box calculators so can someone please help a fellow bass head out and please send me a blueprint of this and a cut list of sides and port and everything pretty please b greatly appreciated
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How do you find or know your vehicles peak frequency? And how much high or lower than that should you tune you box for spl applications? I drive a 06 silverado extended cab.
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- 7 replies
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Hello, I have a box designed and it currently has 4.6 cubic feet net internal volume after wall thickness/drivers/bracing. I would like to port this box and the port face is 13.5hx4w. What length would the port need to be to tune the box to 33hz and 35hz? Also what would the lenght need to be if the port face was 13.5hx4.5w? Thanks
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- 3 replies
- 788 views
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i had an idea similar to these enclosures for my next project and i was wondering is there any downside to having one built like this?
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- 3 replies
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Anyone from the Long Island NY/NJ/CT Area want to build me a sealed enclosure for 2 12s - or know of anyplace that would? I'm not looking for anything extravagant, just something ~ 1.5 FT^3 per chamber. I don't have the time to do it myself (and I've never made one). Trying to stay away from pre-fab junk. Shipping or Pick-up is cool. Can someone help me out? Thanks, Snapper
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- 787 views
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I have 2 AQ SDC2.5 with an AQ1200D amp. I have a 5 Cube box for them now but due to the fact that it wasnt planned out very good the box in crap and is all but falling apart now. I came up with another design but im not sure how well this will work. The subs call for 2.5 cubes a piece but with my new design it will be around 2.2 cubes a piece and the subs would be pointing pretty much up. I know that these are not ideal conditions for the subwoofers however how much do you think this would effect the overall sound. This is it any comments plz.
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- 3 replies
- 787 views
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so today i noticed my port feels like 80grit sand paper becouse i forgot to glass it will fiberglassing this thing give me gains??? its gata sound better right?
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- 3 replies
- 787 views
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I drive an Olds Bravada (basically a blazer) and I drive it daily, but its a weekend warrior for spl. I have an AA Havoc 15, I'm building the box to the SSA Icon enclosure specs, and running it off a MB Quart Discus 1500. Which would sound better/get louder, facing the sub and port up, or sub and port back? If I face the sub up I can actually use some of my cargo area.. but that isn't a big necessity. It is a four door if that matters.
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I want to build a box for my 8's I have 4 aa assians its goign to go in a gmc serria 2 wheel drive reg cab i would like some software to do it tryed a few places but the things wont work my a chitty computer i cant make the box as big i as i want cuz of space so if u know of any free god software or any "cheap" software that I could buy that would be great
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a. Subwoofers in question, number of subwoofers & subwoofer size: Dual SA-10's b. Amplifier being used, specifically the model number: 1200 watt Hifonics Brutus (will probably end up upgrading it to a 2000) c. Fabrication skill level: will be made by a box builder d. Preferred material to be used (i.e. MDF, fibreglass, etc): mdf e. Vehicle which the subwoofers will be used in: 93 toyota celica f. Musical preferences: rap g. System goals: SPL all the way h. 37 Hz range i. max dimensions: 38 length x 20 width x 16 in height
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- 7 replies
- 786 views
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I'm going to be purchasing a table saw in the near future. My question is: how big do I need? The only local place to buy MDF in my area only sells in 4x8 sheets, so I'd have rinse this saw with that initially. I found a nice looking one at lowes for $150. It's a 10". I don't know what the 10 inches refers to.. Would that be big enough to get the job done on a 4x8 sheet of MDF? If not, what about 4x4? I think lowes can cut the sheets in half for me.
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- 4 replies
- 784 views
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Would a box that is 2.046 cubes after all displacements with 2 ports that are 1.875x8x22" (will be behind my back seat in my truck) be ok or sound good or give me fair spl numbers with 3 or 4 sa-8s v1 d2s or 3 or 4 orphan 8s in it running off a crescendo bc2000? Is it enough port area? Box volume? Is there anything I should change?
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- 2 replies
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