SPL & SQ / Fabrication

When building a common chamber ported box for four subs do I take the suggested enclosure volume for the sub and multiply it by the number of subs. ex. A sub requires 1.25 cub. feet minimum. The enclosure is going to have 4 of these subs does that mean that the box should be 5 cubes since 1.25 x 4 = 5

does anyone have any rituals before they go in the lane?

I'm trying to build a box for a single FI BL 15, fully loaded. I want it tuned around 32-33 hz. Also my trunk in my car is kinda small height wise, so I was wondering if it was possible to put the sub on the top of the box and lower the height a little bit so the sub doesnt get close to the top of the trunk. The port I want on the front. Is that possible? The dimensions I have so far are: Width - 32 Height - 14 Depth - 25 Port Height - 12.5 Port Width - 5 Port Length 1 - 19.25 Port Length 2 - 8 62.5 inches Total Port Area, 3.8 ft^3 for box. Tuned at ~32. Would it be possible to put the sub on top of the box with this design, and still have the port on the front?

Okay, so there are two ways I can go about this. In the back of a Grand Cherokee I want either 2 15s or 4 12s. I was looking at buying 2 Dual 12 aeroport boxes from Davetheboxguy. Just hooking up 4 Soundqubed HDS200s and calling it a day. OR I could design and create my own box for 2 15s (I was thinking SSA ICON or the HDS300s or perhaps the HDC 3.0) The amplifier will possibly be a BC2000d good for 2250 rms. I could step it up if need be if somebody could recommend an amp that doesn't cost much more but will give enough power. Should I go with 4 12s, or 2 15s. (Yes I know its preference but I am good with either one so help me out here) and I am going to start workin…

I purchased this sub on closeout from Parts Express earlier this year when TC-Sounds was filing for bankruptcy. My daily enclosure is a sealed pair of RL-i8's. I'd like to build a ported box for this single TC-Sounds 12" sub but I'm a complete noob when it comes to enclosure design. My typical listening style is loud SQ; typical artists include Smashing Pumpkins, NiN, and Daft Punk. Any suggestions? This is just for fun, so feel free to be creative.

Got a question: Noticed that spl meters seem to have a simple pressure sensor in them. Does anyone know the formula to convert SPL to PSI? If so, I may just make a home brew SPL meter to test changes made. I have a 3-bar map sensor sitting around which can read the barometric at first for calibration, then anything after that. Or am I way off base here?

Forgot I uploaded these to photobucket Quite the challenge considering it's a crackerbox tracker, that's a manual, and I wear a size 15 shoe. I'll get some more pics when I get back home.

I have an old 2 channel amp that i wAnt to put in my truck. Should it go on tye front door 6.5s or on the back door 6.5s? My sub is in the back seat also... But what would sound better? Iv been told the back would sound better... But i feel the front would. What do you guys think? They are the kicker ds series 6.5s and its like a 40rms amp or so per channel... Coment please!

I'm working on a box design for a single ported SA-12. I looked at the Sketchup design they have for a 1-12 ported, and I came up with this for my vehicle. It seems pretty dead on. Is the 13.5" x 2" port too narrow? The one in the Sketchup is 14" x 2" so I figure it's good. Thanks.

i just started building my first mdf box. im using 2 1/2 inch drywall screws and the proper drill bit. everytime i try to put them in, i split the wood. are these screws to long? not drilling fast enough or what? done it 4 times so far, and i dont want to keep wasting wood.

Hi, Just pick up a HDS208, Would like some help with a box design. Because i don't know how much Sd this speaker takes up. I'm just looking at a 1cuft box tune to 35hz. look at a box 14x20x10 external measurement with a 3inch aero port x 16.5 Please advise, Gao

I'm going to be building a second enclosure for my Fi Bl 15. For my first enclosure I made it out of Birch Plywood so what I was wondering was if Cherry, walnut or poplar would be good for a box?

This has nothing to do with audio, so if this is in the wrong section, I apologize and feel free to move it. The package tray for my hatch was broken when I bought the car. Looks like someone put something too heavy on it and cracked the structure inside. Can I lay chop mat down on top of the carpet and resin it or will the resin not adhere to the carpet? I'm just looking to do the underside of this to make it rigid enough to hold it's shape again when it's in the car. I've heard you should lay rope or something similar to give the mat a corrugated look for linear strength. Here's a picture of the underside of the tray where I'd like to strengthen it. The carpet is hook…

I just got a box design confirmed by a few of my friends that it will work.. Now I do not have the space for it (doh). It is literally a few inches too big to fit in my trunk. Pretty much it is a 4 cuFt box tuned to 30hz using two removable aeroports. One removed keeps the tuning at 30hz, two in makes the tuning 44hz for comps. Now my question is what if I use pvc piping (I heard its not as loud because its not flared) and instead of having it come straight out, make a 90 degree angle as soon as it leaves the box... Anybody know what this would do for tuning? Or how to figure out with a box calculator what it may do?

Hi All, Now at my job i search McMaster-Carr very frequently. and today i decided "hey lets see what they have for sound stuff" (cause they have EVERYTHING! lol) so i did a quick search for "Sound" and found they have some nice sound barrier material and some nice sound dampening stuff, looks just like the Sound Deadener Showdown Stuff just thicker and with a backing ( http://www.sounddeadenershowdown.com/cgi-bin/index.cgi ) any ways i was just wondering if the stuff on mcmaster-carr is good sound barrier or good sound dampening? Links Below: McMaster-Carr McMaster-Carr McMaster-Carr McMaster-Carr

I am pretty serious about doing a blowthrough to my F-150 in the next few months. I am pretty settled on 2 18"s on 4000 watts (will be more with upgrades in the future.) I was thinking of a 4th order bandpass box for them but I want to be loud on low hertz (like around 30-35). How can I accomplish this? Also, what would be better: 2 18" or 4 15" all on 4000 watts? Like I said, I want to be loud but hit low.

Hello, I have a single BTL N2 12" D2, running on my saz 1500 at 1 Ohm. The box is 2.1 ft3 at 32 Hz, with a slot port. Port firing to the side of my truk. The car is a Toyota auris hatchback. On the TL I only scored 135.8 db sealed at the windshield, and I want higher numbers. It was at 58 Hz : I don't know why it was so high ! 138db with driver's side door open. What can I do ? I want a new box, but do I look for a bigger box, smaller box ? Do I need to have sub and port firing up ? I think I will try an higher tuning, like 34 Hz. Is it worth it ? I'm looking for suggestions. So I can ask a good box designer to work for me.

Okay so many designs and tunnings have been done at this point any new ideas will help!! Car freq: 50-51hz box tunned to 48hz 145.2db 8.2cbs boxtunned to 43hz 148.8 db 5.2cbs boxtunned to 38hz 147.1db 5.2 cbs boxtunned to 32hz 145.6db 5.4 cbs all boxes are vented box style subs firing up. box tunned to 38hz 3-3'' aeros 4.0 cubes 143.5db boxtunned to 45hz 3-3" aeros 4.0 cubes 139.0 db subs up ports back also tried firing to left side of car then right no change all recorded loses?????? any help will be great!!!!!!!!!!!!!!!!!!!! thanks,

Okay, I have a guy that lives behind me that has three 12" Kicker CVR's . He currently has them in a very crappy box and is wanting me to throw a better box together for him. I stand to make a few bucks from this project. that is all. there is no possibility of him competing or even keeping this setup long term. just a better box than he has and some cash in ol' chop's pocket. So for the sake of getting good responses, i am not looking to buy these, i only want to get some good input on what volume and tunning would be good for them to get loud with. not a fart box, but i am sure he has no interest in catching the lows. I have not used these subs before..... off the top o…

Just starting an install journal here. Ive made most of the progress so far only having the trunk left to do after finishing up the install of the kicks/horns. Feel free to ask any questions. See sig. for other components in install. thats all fer now folks

i was going to sound dead my box in and out with some raammat i bought ... does it really help all that much? i was going to coat the inside and outside ... is that beneficial or can I get away with just doing the inside?

Well I pulled the trigger and I got 2 evil 18s. A lot of my friends are telling me 4th order bandpass I'm not completely sold on doing it. One of my friends has the same Subs and paid for a custom design for his vehicle where sealed is 5.5 cubes ported is 14.8. SSA recommends 4.5 - 6.25 sealed. I realize that is strictly for a sealed box, but my question is that 5.5 that they have designed for him is only big enough for 1 sub. Is the design rules different with 4th orders? I'm leaning more towards just a regular ported but my thought process was for an extra 2-3cu tops why not have the same set up?

My uncle had all the tools to help with the build but then a lady drove into his garage and in the process ran over the main gas line. His whole garage was torched, including the tools and his brand new Honda Pilot. Since the last time I've posted, I haven't had time to build it but a coworker of mine wants to help out with the build so I just wanted to go over some options. TIA My max outside dimensions: W=35" L=8.5" H=15". This is going in an '06 Suby wagon. The sealed box should work fine but I'm wondering if ported could work also. I listen to some rap, but mostly alternative and stuff like Blue October, Silversun Pickups, etc. I think I have the room for ported…

so this last weekend i went to my first ever spl competition and i didnt meter as well as i would have hoped but people were nice enough to help me out. one of the suggestions was find the right hertz for my truck. so i was hoping someone on here has a truck like or knows someone that has a truck like mine and knows the right hertz for my truck. i have a two door tahoe i have 4 12'' ppi pcx subs in a 6.5 cubic foot box with two 6'' round ports tuned at 32 hertz. i got told that i need to make a square wooden port and it needs to be at least 18'' in length i dont know if thats right or not so id thought id ask. i plan on making another new port this weekend for my next c…

I'm currently building my first 6th order bandpass enclosure. I need a way to make the top panel secure to the box, but easily removable for access to the sub once the top is put on. Here is what I have done thus far. I have also added weather stripping all around to prevent leaking. I'm looking for suggestions for the best way to go about this other than glue and screws. Thanks in advance.