SPL & SQ / Fabrication

ok so one night i was sitting around thinking up some new box ideas. i really want to have my sub facing forward into the cab of my car, and have the port be on top of the subwoofer. so i was doing some concepting and came up with this, Pdf of box idea. I just want to know if it will work before i start building i forgot to put notes so.... notes: 1. double baffle front plate 2. round port edges 3. 2.8 ^3 feet of airspace after all displacement 4. 3/4" mdf or particle board used. its going to be firing forward with the trunk sealed from the cabin. thanks, Anton Miller

Ok so im going to build a box for my new setup and im still not getting this port thing. Alright so the dimensions i want the box to be is. Height 20, Width 49, Length 50. And tuned to 32 hz.

Enclosure for 12 FI BL Just wanted to see if anyone has any opinions on this box setup. 2.2 Cubic feet H x D x W 17" 13.092" 30" It would be 33 hz tuning. With port area of 30.8" . I am using 14 square inches per cubic foot Does this sound about right with my calculations or am I way off? I have the cut sheets written down but not sure if its needed in this post.

I have 2 12" DB Drives the model number is: PLW12D4. I would like to know what the total dimensions for a box should be like the inside area and the LxWxD should be? What should it be made out of? How the port should be and where the port should be? how many Hz should it be for the best possible SPL? Also, the box is going in a 1997 Ford Thunderbird. Right now I have the subs each wired to there own amp and the amps are Crunch Pzi1500.1 so are these amps good enough or should I look into buying a new amp, If so what amp? The subs are rated as follows: 2000 watts total power and 1000 Watts RMS. I don't think I am powering them to there full capacity. So any sugges…

Just got metered on an Audio control...Did it with music. One song (The one I figured was the loudest) hit 145.0db! The song was Plies - All Black slowed by wattz305 All the other songs we tried were in the 140-143.5 range. I went in figuring I'd be happy hitting those numbers. Around 40hz seems to be the sweet spot. Still wish I had access to a termlab though.

As many boxes as I built, my mind went blank today. I am trying to build a 30in long port with 1 bend. Do I measure in the center of the corner or along the inside port walls? Someone help a mind blank guy out?!

this is what i got the box is 41''w--18''tall---26''deep--this is all outside --the port is 3.5''tall---27''wide---18''deep----i think i have like--7.75cf net--port tuned to--33hz--can someone tell me if this is right----the subs are the--FI BL 15''---i will have a---ia 20.1--on ea sub let me no what you think and if i need to do something about the box

im looking a good online site to buy some epoxy resin along with some 4 or 5 inch wide 18oz.(or so) cloth tape...anyone know of any good sites?

hi, i have been doing so searching and i see that some people use clay as a spacer and i am wondering 2 things. how well they work and the other being how do you do it. cuz i need 2" spacers on the cheap side and all i could think of on how to get the clay to work for me is use something like these http://www.homedepot.com/webapp/wcs/stores...03+501959+90025 to give the clearance and then just fill in the space with clay and more then likely us fiberglass resin to make sure it is seal.

I think this is the right place to put this. Ok, I want loud, but not "boomy" bass. Is that possible??? I will be pushing my 2 RL-p 15's with an A2400DB Power Acoustik amp (1800w rms @1ohm). Would my best bet be to go with a sealed box?? Or should I go with a ported one?? I listen to hiphop, rock, and everything in between. I would like to have a good LSQ system. Any info you can give me would be great. Thx, Victor. B) P.S. this system is going into a s10 xcab. So the subs will be inside with me not in a trunk.

Can you order 1" MDF somewhere online? does home depot or lowes carry this? What about 1" birch plywood. I want strong but lightweight.

hi, i planned to do a wall setup and the vehicle will be a 4-door Toyota Landcruiser. The wall will be as close as possible with the front seats but not up to compromising seating comfortably. How do you seal off the portion where there is window? i see that the front wall will be sitting halfway of the rear passenger door window. thanks

What's the best way to figure out the displacement for each one of these? They will be about 15.75" long & 1.5" in diameter. I used them on the last build I did for the blazer, and they held strong, and were easy to use. So I'm thinking of using them again with my next one. Thx for the help.

so i have just bought 4 ppi pcx 12'' subs and i need help building a box but im not good at all with knowing how big or long to make my port. i have a two door tahoe and i have plenty of space height 22'' width 46'' and length 37''. here are the specs each sub needs 1.25 cubic feet so 5 cubic feet all together. speaker displacement incuded is already included port diameter 2.6'' (inside) per sub port length 12'' per sub Equivalent Square Port 2.3x2.3 per sub if anyone could help that would be awesome i would also they the box to be around 30 hz's too

I have the Morel Dotech Ovation 6 two way set and was wondering if I could still use them to go three way sometime next year. I actually was thinking of using the Selenium 6 inch midwoofers as midrange or should I just get another midrange for this? I actually was told to use the Morel midrange but some say go with Hertz Audio midrange. What you folks think and I am going active with this in the future. Thank you.

so, im currently redesigning yet another enclosure for my home theater mains. was wondering what the effects, pros, cons are on port placement. using a 3 inch round port. a 6.5 and a 1 inch tweeter. so top near tweeter or on bottom below mid or just rear firing? pros cons? im thinking port on bottom with about 2 inches of separation between port and mid.

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…

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I'm in the process of designing an enclosure for my Fi BTL UFO 12. I've drawn up two different designs with the only difference being the way the port is constructed. I've seen it done both ways, but I am unsure which would be most beneficial in my situation. Each design is 2.85ft^3 net tuned to 33hz for a front firing setup sealed from the trunk of a 99 Pontiac Grand Am. Does anyone have any experience/input on which would work best for me as far as loading, port noise etc.?Please use "left design" and "right design" when referencing for clarity as I am unsure what to call each one specifically. Note: I will not be adding any 45's within the port, but each edge will be…

I need help mainly with the port calculations for a 10 cubic ft box and a 20cubic ft box This will not be a chambered Box I'm "not sure what size cubic ft box I'm gona build yet" So if you have a formula that can figure port sizes that will help allot this is for two BL 18'' subs. I can build a box just need some help with this. Thanks

Subs: 2 dual 2 12" sa's Amp: kicker 2500.1 Car: 01 monte carlo Currently I have a 3.5cu box with a slot port, both fired towards the rear. They were fired into the cabin and I got a 140.x. I was told firing them the other way (how they are now) would post better numbers. I've yet to get metered though and can't tell a difference by ear. The plan is to build a new box with a 6" aero port firing to the right with subs facing back. Can anyone chime in with a better suggestion or confirm this would post good numbers? -Thanks

I have a lot better success in making 1 single run with the port if i side fire rather then fire back. I prefer not to have to bend the port(s) is why i am asking if there is anything "off" sounding to this. My max square dimensions in cargo area is - (for this height) 42" wide x 12" high x 24.25" deep. If i were leave a 7" gap in the width to allow air to escape out of the box and shoot up towards the car, i would then have- 35" wide x 12" high x 24.25" deep. At the very back of the box on the side, i would, for example, have a 10.5" high x 4" wide port. I'm assuming i should have it as far back in the car as possible when side firing. If i choose to side fire, should i …

If you run the port externally, does it take up space or add to space inside the enclosure. Same idea as inverting your subs, they still take up space inside the enclosure, correct? Thanks

Not so good with building these kind of boxes never seem to e the dims right. any ideas or designs that have actually worked. so lets here some ideas or formulas"

I need a box for.4 12 sa ported to be put in a 99 crownvic can anybody.help me this and a set price would be nice i live in fla