SPL & SQ / Fabrication

Starting a box for a friend tomorrow. He has 2 12in kicker cvr's in a prefab box with the ports stuffed with towels because it's way to small to be ported. Lol I will be building a 5 cu box tuned at 32hz. Dimensions are 36w x26d x15h, port is 5in x 13.5in and around 26 in long. It will be 3/4, double baffled and 1in dowel braced. He doesn't have much power JLa1400 (500rms) Should be good for when he can get some real subs and a bigger amp. It's going in a Cadillac deville trunk rear facing. Opinions are welcome., although after spending about a hour making the cut sheet I am pretty set on it, lol. Can post pics during build if anyone wants to see it, should be a huge i…

Basically what im asking is that if I want to add another 15, I will build a new aero-ported box. What is a good way to estimate how much volume i should have? One of my 15's requires 3.5-4 optimal ported volume, i was thinking about increasing to 6.5-7.5 for two? Having a 12 ft^3 trunk really sucks sometimes...

Pretty simple question. Anyone ever personally built and owned two 15s in a seales enclosure? Im gonna be doin It soon probably and was wondering what your results were. My box design Is around 5 cubes after displacements. They'll be two old style havoc 15s. And ill be running them on mg aq1200 until budget gets me a bigger amp or a diff box or set up. Thanks

Hey guys new to this site and would like some help im not new to building boxes done a couple but always had a blue print for them .I have an 03 envoy and have 48x30x36 to work with im planning on getting 2 18bl powering them up with 1800 watts a piece 4 kenetic batts and 250 amp alt.just need help on getting blue prints for my build.thanks

This is my first post on here, and need some advice from the BTL gurus I just picked up two BTL 18's, dual 2's, fully loaded, and will be running them off of two modded Memphis Mojo MC-2000d amplifiers (1 on each driver at 1 ohm), approx. 3000 watts each. In my vehicle, which is a 2007 Toyota FJ Cruiser, I don't have a whole lot of useable space to work with and still maintain practicality, so the enclosure is going to be a bit tight for specs. I will run the subs inverted to try to save as much airspace as I can, but I only have a total of 11.2 cubes to work with, before port displacement. This is going to be a daily setup, and I am more than likely going to build it…

Just starting to get really into car audio...Bought the Fi BL 18 last year and put it in a 4.0 cubic ft box running around 1100 RMS (i know its a small box, but its in a trunk).. haven't driven in over year, but about to start back up. My question is what makes the bass sound so different.. I mean my friend had 2 12's in a smaller box and his just sounds so clean and clear, while it sounds crisp inside, on the outside the car it really isn't banging like it is in the inside. My set up however just sounded mean and powerful inside the car and fairly loud on the outside..I've heard the terms (clean bass) and (dirty bass) before, but I'm not exactly sure what is meant by t…

I was wondering if you could have to ports on a enclosure and have each of them tuned differently, for example, one would be tuned to 30hz and the other to 35hz, would this enhance the sound or ruin it? I'm just curious.

Well, it seems that i will be getting these subwoofers a bit quicker than i thought.. Haven't order them quite yet but i decided that getting a ported box design ready couldn't hurt. Trunk Dimensions: Height = 19" (So i was thinking box should be around 17.5" maximum) Width = 36" (Narrowest point near the back seats) = 47" (More towards middle of trunk) Depth = 36" (Need room for battery, amplifiers, ect.) Now iv never dealt with Q's before so im not really sure what i should tune the port for.. It says anywhere from 28-33hz, now i listen to all types of music so i was thi…

Hey guys, a friend of mine is looking to install his Tymphany Lat 700 in his Chevy Astro. Currently I'm looking at 40x21.5x10 with 2 3" ports. Length of 15" for the ports tuned to 24Hz. Torres says this is correct. It's mainly a show piece, and he wants to get it moving. Can anyone help me out with a box design or recommendations? It's kind of an odd driver(s) http://www.tymphany.com/files/resources/dlat/LAT700-001.pdf Sub will be used on music not Home Theater

For my box for 2 12" xcons I want to something that is lighter than mdf. What are some other types of wood people use to build light weight boxes? I was looking at Baltic birch 13 ply that can be ordered from my local hardware store at my dads for around 95 shipped there. At the Home Depot by my house has birch (not baltic) 5 ply. How much better is 13 ply than the 5? I want to call the flint lumber yard and see how much their 13 ply BB is. Is there anything less expensive that people use but is also lighter than mdf?

We are having a meca sponsered show, and should be a blast , there was about 50 cars here last time, and everyone had a blast. if you have any questions feel free to call us at 269-426-0009 ask for kyle here is the link to the flyer for the show. http://www.mecacaraudio.com/flyers/5-20-07MIv2.pdf

I'm looking for two tens to put under my back seat, can anyone give me suggestions on subs and who makes a good box for my 2010 silverado. I would like good SQ.

This may sound like a stupid question, but I have yet to find someone who can give me a good answer to it: How do multiple drivers react when installed in a single undivided sealed enclosure - with regard to (Fb/F3 etc.)? For instance - Say you install 4 12" drivers in a single undivided 4.0 ft3 (Net) enclosure. Do the woofers react as if each driver was installed in it's own 1.0 ft3 box, as if each was installed in it's own 4.0 Ft3 box, or Somewhere in between? If so, is there some easy formula to calculate the volume that each driver "sees" to determine box response characteristics? Thanks, Hans

So last time I entered an spl I tied a guy with two 10" solo x's and a rockford fosgate t3000, and there's another in 2 weeks and im sure he will be there. I dont want to risk damaging my sub by upping the gains or voltage any more than i did last time, but perhaps i can adjust the box/ place it in my car differently? The box is a little over 4^3 at 31, and it is about a foot back in my trunk facing into the car. Only ideas i have now are putting 45's in my corners to help flow and raise tuning, and face the sub towards the trunk. Are there any little tricks anyone knows about to give me just a .1 or .2 db gain?

Okay so i'm planning on having a box built for 2 12"s and having the subs face the roof (see pic) I'm wondering if I have a top piece of wood above the subs, how that would affect the sound? The top piece of wood would be above the subs by a couple inches. This would allow me to put stuff on my box for storage (ex: my backpack...) Does this make sense?

Got a 12" BTL in 2.8cuft enclosure at 30Hz. Upgraded from a BL, and well, it took about a week to get used to the BTL. I have 31" x 18" x 16" of enclosure space available, maximum. (largest I can fit in trunk opening) However there's some space around enclosure once in. Would like to upgrade to something else. 31 x 18 x 16 = 4.0cuft internal before displacement with 3/4 MDF Would like 12" Q's. Can it be done using external areo ports? Or what are my other options? I have a 2500D amplifier. Goals are to move more air than the 12" BTL, and I prefer lows.

Yes... I have moved from Corpus Christi and have brought back USACI to the DFW area. I look foward to getting back in the groove with everyone here. You can check out www.myspace.com/usaciofnorthtexas If you need to know who I am and what I have done, go to www.myspace.com/bigmel22 Thats my life story and I hope to lower the boom in the DFW area.

I know it's a long ways from anywhere, but if you happen to be close by.....come bump w/ us!

as topic states, who is going? competing or spectating? Me, competing in 601+mod, gonna get my butt handed to me but its all good.

s10 blazer. i have 6.5 door space tweeter space in dash.if i added another set of comps in the kick panel would i wreck my sq. just wondering being that one tweet in dash one down in kick. how about comps in kick panel and use the door for just a 6.5 mid

Ok so i'm pretty much done wt my box, will post pics soon enough, but. I'm not going to be able to reach my subs, once done, so if i connect each + and - to a bolt and nut on the box, that should work just fine correct? I'm sure i've seen it done before. I just would rather not run long lengths of wire to the amp.

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.

My plan is to use 3 fans as a just in case precaution the way how i am making my new floor in my car to house my amps. I will be contacting a couple companies tomorrow but before that time comes, lets see if anyone knows this- Can pc case fans be used in my car? I ask this because of the following- All these case fans i'm looking at are rated as follows- Rated voltage= 12v Starting voltage= 6v (there is only 2 lines on the fan, +12v and -12v so 6v gots me lost... Anyways, i do not know the voltage tolerance of pc case fans... My voltage runs at 14.9v. PSUs typically are set to a max of 10% + or - on any voltage line before they shut down. This means a pc fan could never …

I know I've seen plenty of people use spray/roll on bed linings for the outside of their enclosures and such. I am wondering two things though, was it applied to the bare MDF or with a primer on the MDF first and how well is it holding up after "x" amount of time? I'm about to start on the enclosure and amp rack for my Jimmy. I had planned to paint the port to match the truck and use standard charcoal colored cabinet carpet to cover the box and amp rack with. Though upon thinking about possible liquid damage to the MDF on the floor/amp rack I'll be building I thought perhaps the liquid bed liner may be the better route. I have no experience with it though so I was ho…

hey guys one of my buddies says a nice cheap effective meathod for sound deadening is resisto found in roofing sections in homehardware stores... apparently its not as good as the top dynamat or raammat but he says its pretty much the same stuff as fatmat which is cement based (not Butyl). can anyone confirm? i would be real interested to use this stuff (if it works) on my trunk lid and a bit of the back of my trunk to stop trunk raddling. thx -phil