SPL & SQ / Fabrication

can someone tell me what a t-line enclosure is and whats the advantage

Ok, I tried to do some research about tuning and port area, so I didn't have to make a thread. I read a thread on smd and they were saying 10sqin per cube was better for low tuning and then others were saying other things like more the better so I don't know which is right. A lot of misleading information out there!! Much rather ask here and know I'm getting the right answer lol I'm most likely going to be ask pro-rabbit for a design once I am sure of my measurements,It'd be nice to know exactly what it should be, so I can expand my knowledge. I would like to know for my system specifically, but also in general. EQUIPMENT: Subs: 2 SSA Zcon 12s Amp: 2 Crescendo BC2000s(won…

So I'm good at building enclosures.....calculating ported enclosures? Not so much. I've just bought a new tow vehicle and using some budget equipment to put a nice setup in it. These are new items I've had laying around to put into a project car I'm building that won't be finished for a while. Vehicle : 2004 Escalade ESV (Suburban sized one) Location in the vehicle: Rear hatch, against the 3rd row. Want to keep some cargo room Space available (Length x Width x Height): 46" wide is set. 16" deep is set. The height is my variable. 20" is maximum. All dimensions are internal. Subwoofer make and model: Subwoofers are JBL GTO 4 ohm models Subwoofer Size: 12" …

ok so i built a box for my new nightshade 18. it is just under 5 cubic feet before sub displacement but after port displacement. it is tuned to 31 hz b4 the sub. it sounds great. my question is if the port area is too small. the re calculator that i used said that the square port area was 55.5. idk if this means inches or what but im guessing inches. the sub performs great at higher frequencies but the lows are kinda lacking compared to the 18" fi q that i had before. any info would be great. also if somebody would be willing to design me an optimal box that would be great too. my dimensions are 36" wide 22" tall and 20" deep. sub and port would have to be facing up. i li…

I finished my fiberglass box yesterday for 1 15" icon yesterday, kinda anyway. Its a little on the small side at 1.8 cubes. I plan on adding some polyfill to bring it up to ssa's specs for 2-2.5 cubes. I just dont know how much to add, I have a 20 oz bag of polyfill at the house. Any advice?

I got a cut sheet from skar audio, and i want to know others opinions on it. Ive tried to draw it up on paper to visualize, and ive done some calculations to help someone who knows how to use the info. Its for a friend so i don't wanna waste his cash on a shit design. Ok so he has a 97 Jeep grand cherokee. 90a alternator, I did the big 3 for him in some 4 gauge stinger pro i had laying around, and he had already bought a Rockford amp kit 4 gauge also...pretty nice wire. Ok the max dims are 36" wide, 36"deep and 30"tall, this leaves plenty space for the port to breath either up our back..The subwoofer is a skar audio ivx15 V1. Its a d2 coil. Here's spec off woofersetc.co…

How much mdf would i need to build a sealed 3 cubic foot enclosure for my 15" xcon

I got JBL GTO 1514 single voice coil 4 ohms. 350WRMS, 15 inch. It came with manual and says Vbox 3.50 ft3 Fb 30.0Hz, so is this box tuned to 30hz ? Im thinking of making new box and i really need ideas how to improve my SPL. I want to try different box, something like this: At the moment i just have vented box with round pipe. but i want to make something like in the picture, so how can i calculate box size ?

i have a box with 4.4 cubes after sub. it has 2 4"x12" ports can some one tell me what it is tuned to please

I am new here and need some help, so if you could help me, thanks in advance. I have a 96 Mitsubishi Eclipse (with a sun roof) and 2 12" audiobahn aw1200q subs. I have a lanzar 4000 watt amp for the subs and a stinger battery and batcap 800 as well as 0 gauge wiring all around. can you help me with a setup that will "pound" right now I am hitting a 141.xx thanks you!

Hey guys. im buildind a new box for the sa8s. my dimensions are 56w 16d 8.5 tall. im shooting for around 35 sq in of port and 2.0-2.2 cubic ft volume. the subs displacment is .10 each driver. i put it into the re calculator ( i know its not exact) but i want the port in the center of the box and not one side or the other but thats not an option. i want the 4 subs facing forward and port back. anybody got some extra time to help me out? much appreciated!! Steve

I think I am moving from and L port to aero ports o I can get a little bit bigger box. I am trying to use this tool except I cant seem to get what I want. I am looking for about a 4.75 cuFt box (including displacement and bracing) with a depth no longer than 18 inches. I would like to get around 35hz for daily and 45-50 for competitions. Any suggestions? Help? The box is going to hopefully be 38w 17.5h and 18d which comes to a little more than 5cuFt and shuold be around 4.75 cuFt with displacement

Im designing a new box for my FiQ for my blazer. I was was wondering where the sub and port should go? Sub up firing, port rear firing? Also if one or both rear fire how far from the tail gate should it be? Thanks

I have a F250 Crew Cab and have 3 JL old 10w6s powered by a Diamond Audio D61000.1. They are in a 52" long box ported to 33hz. I want to get a 10" Fi BL and 1) wanted to know if this will hit harder that the JLs and 2) the box recommended for the BL is 1.5cubes, could I make a bigger box for the 10?

Wood Thickness 0.75 Height 30 Width 38.5 Depth 15 Sub Displacement 0.42 Port Height 28.5 Port Width 3 Tuning Frequency 32 Port Length 29 3/16 I get Around 6 Cubes at around 32 hz, after sub and port displacement...i just want to be sure they are correct. thanks.

This may come out the most newb question on earth. When running multiple woofers, do you need a amp that is ratted to power the RMS of each woofer or both woofers? In my case, for 2 btls, to run both off one amp do I need a 4,000RMS amp or a 2,000RMS amp? or should I just be looking at individual amps like strapping 2 sundown 1500s together? I've been looking at the sundowns and the rockford 2000 and 4000 amps.

So, i want to build a custom box for a Range Rover classic, LWB Box is for two 12" Alpine Type R's. I want the subs facing towards the roof and the port facing the rear of the vehicle, the "classic" SUV style. Although, the truck comes with a stock cover over the very rear, i want the box to be underneath that, so when i park i can cover the stuff up and keep people from wondering around the car. What wood should be used? Also, any special tricks with making boxes? I will provide picks tomorrow if needed.

I have been to the 2 local (small ) car stereo shops in the area and neither have RTA. Anyone have any suggest to get a reading of my system. Would love to be able to get it tuned up

Never used allthread in a high pressure install so need some small tips in this area. I know that when allthread is ran from one side to another that washers and nuts are used on both sides of a wall. So that means 1 run of allthread will have 4 washers and 4 nuts on it. What kind of washers and nuts am i suppose to use inside of the box to prevent them from coming loose? I looked at nylon lock nuts but i cant use those on the inside because to get the nuts on the inside, you have to roll em on before you slide the allthread through the other wall. So, roll nut one way then back the other way to lock in place... nylon nuts appear to only roll in one direction so i dont k…

K, box dimensions are 35x32x16 externally. Internally this gives me roughly 8.57Cubes. I want to port this to 34hz or so, and i need a min area of 6 cubic feet after displacements, is this possible? I also need to know how many sq inches of port i should need. I am just going to run out and grab 2 sheets of MDF right now so any help would be wonderful. The only confusing part is that the RE calculator keeps giving me ridiculous port lengths when removing the second portion of the L to make it a square. Any port dimension recommendations would be wonderful. Thanks in advance. Chris

Does anyone know what the tuning is of the dual X15 box sundown recomends? And how many cubic ft it is?

Hey guys I was wondering if I could get some help for a box design. I messed up my first design as my box fits inside my car but I FORGOT to measure the opening of my trunk to put the box in which doesn't allow it to slide right in. I am coming to you guys for a design for the Fi 15" BTL. And the car I have is a 95 Honda Accord. Max width I will go is 35" and the height will 16.5". Was looking for maybe 4 cubes of space @ 35Hz. I would really appreciate the help and thanks in advance! -Curt

is there any discernible difference between a square port and a circular port. I'm thinking about using a circular port tube from somewhere like Elemental designs. Mainly due in part to my lack of knowledge and how to build a ported enclosure.

im converting 4 3" round ports to 1 square port. i made a 4x7 square this just seems smaller then 4 3" round port... please help.