SPL & SQ / Fabrication

I am going to build a sealed box for 2 dc level 3 15s and i want to know how many cubic feet should be in each chamber.

Im having a hell of a time fitting a box into my s10, along time ago i bought a pre fabbed sealed enclosure for 2 12's, downfire design.. fits nicely behind the seats.. well the box is crap and im ready to go ported, i have 2 Re SR12's i built a box for and it was garbage as well.. has anyone built a box for these trucks? mine is a 1998. Im thinking about just going with 1 12" to get an optimal box size. More than likely a Fi BL or Q 12". havent decided yet.. so again if anyone has built for this vehicle or can show me some pictures of what other people do i would appreciate it. Also Im a bigger guy so the seat needs to be as far back as possible (no tilt wheel).

I can get my whole box to bounce up and down on the really low notes, and the woods vibrates a little more than I want. My box has no internal bracing, and it has a double baffle. 33inches wide x 32 inches deep x 12.75 inches high Now how can I strengthen this box without it taking up too much volume (minimum amount) and without having things poke out on the outside. I would use allthread, but that would cause me to have the end/bolt sticking out of the edge of the wood, which cannot happen because the box fits pretty tight. I was thinking about fiberglassing or using wooden dowels. Any suggestions/advice? Thanks!!!! Note: please don't get into arguments about strength an…

I bought a sono tube today for a port for my ssd15 that should be coming in about a week or so. The tube measures about 7.5" diameter. I was planning to make a 4 cuft box tuned to about 28hz or so. But is there any way to curve the tu e to make it a right angle? Lol... idt it will fit inside my box without a curve. And i cant get any fiberglass or resin so what should i do to the cardboard tube to make it hard enough for the port? Could i put poly on it then paint it? Or like any good ideas? And since its not quite 8" tube should i just make a 3.5 or 3 cuft box? And do i need double baffel or should single be strong enough for a ssd15? On 1000rms... please any help will b…

Hey everyone. I was wondering if anyone could explain to me how the freq of a box affects the sound, like what a low freq is good for and how it sounds along with a higher freq? Also, when the inside corners/edges of the box are angled, will that give you better spl? And I was thinking of sanding the edges on the outside of the box to a curve to make them round instead of a straight edge...is that a bad idea? Thanks in advance, Jack3d **Any help is always appreciated

How does this box look for a SA-8? I listen to mostly hip-hop and r&b and I will be placing forty-five degree cutouts in the corners so the port area stays the same all the way through and sub will be inverted.

Ive seen people that compete use thin pvc pipes cut in half and taping it to the walls/edges of the enclosure. Does this help create better airflow? Increase SPL?

I am running 2 18s walled off in my 2002 grand prix. Before I took the 18s out I was doing a 157. I am looking for a component set(I believe stock size is 5.25) so that I can hear my mids and highs over my subs. I am aiming for slightly louder next year as well. Going to try to break that 60 mark. I am not looking to do much fabrication wise so I would like to stick with stock size. I will make a cutout for a super tweeter if that is something someone recommends. I have looked and hunted around a ton, but can't really figure out where to start and what to look for. Any help would be appreciated.

So maybe I'm confused and doing this wrong but I haven't had trouble before. I've been modeling a pair of BL10's based on T/S parameters from the website. I've been told that they work great tuned low for a flat response but they seem to model great on 2.16 cu ft each at 31 Hz. Actually when I run them at 24-26Hz they kinda look like shit. Am I doing something wrong? Or does the 31Hz tune look fantastic for a build? The blue line is 2 drivers in 4.327 cubic feet at 31Hz

hey guys, i have a 18" fi q with bp power. im running it off of a 1600 rms hifonics amp. i have it in the back of a focus hatchback in a 6.3 cubic foot box tuned to 28 hz after displacement. my question is, if i take my backseat out i can build a bigger box. i dont use my backseat much so idc about that lol but say i built a 8 cubic foot box and tuned it the same, would there be any difference? if so what would the difference be besides no backseat?

Well heres the plan. Thats the rear window in my cab. thats the front window in the fiberglass camper shell... I plan to take out both windows and run a gasket between the two. I've heard that you use some kinda RV gasket... what is it called? As far as I know I'm going with two IXL-12s and a 2500D. Would 3/4 MDF be thick enough (Rona has no 1").. I didn't check any other stores.

We have been consistently beating Experts in the top class with unlimited resources. We of course are on a budget. We have over 45 years combined experience between the 2 of us and started out in SPL. We are competing with the current world and SBN iSQc championship vehicle. In the works is my 1988 Red S10 BlaZa to compete in the 159.9 class and win SQ at the same time. below is 10 years ago below is door panels from us in 1992

Hey everyone first off I'm new to the site so I would like to say hi. Now I have a 2006 impala and I have a fi bl 12 and I had a fully costom box build that is right at 2 cubic feet and is tuned at 33hz potted through the trunk deck. Now the sound is horrible so atomatically I think it's the box but my buddy has the same size box and same size port that was taken out of a mozda rx8 and it's just sitting in the bak of a Mazda b2200 and we put the sub in that box and it freakin pounds. We took his treo out and put in my box and it has good sound. So my question is why in the world does the fi not sound good? I have had it in boxes that load up in the truck and sound amazing…

so im pretty new to going to competitions and competting my subs. i was just wondering if only one has any tips or tricks i could use to help gain dbs?? anything will help i just dont want to go in this competition that is coming up and not know something to help me.. i drive a two door tahoe i have 4 12's ppi pcx subs and i was wondering if i folded down my back seat and moved my subs closer to the front would that help (probably a dumd question but you never know until you ask)

i pieced together a simple system for a friend of mine and installed everything, only thing left to do is make the box and slap it in there! we both a totall newbs at sub enclosures and already failed miserably at making one for this sub (long story short, it turned out to be a fart box. box is sub forward port back which makes it interchangeable in positions 5 ways which we like a lot) so i need you guys to help us out on a box design/specs, i dont wanna be pushy but we need the specs by tomorrow because he really wants to build a box thats right and hear his sub how it should be already. hes a carpenter so the woodworking skills and tools are all here and ready. the ma…

It seems to me like BL (typically measured in Tesla meters) would be a good indicator of motor performance and overall subwoofer ability. With that said, I am supprised that numerous woofers that people commonly call, good strong subs have a fairly low BL in comp to other subs. Subjectively strong subs (by overall consumer babble) Image Dynamics IDMax Bl about 10 Jl Audio W7 series BL about 10 MTX 9500 series BL about 10-20 depending on model SS RL-P BL over 20 So is the SS motor twice as strong as a motor rated at 10TM, or am I completely off base. How do BL and RE interact, it seems that BL would be a constant bc its …

whats up, I've had 6 systems in 4 cars, 2 of my cars were hatchback. I had 1 sedan with a sub in the trunk for a year and a half, at that time I was'nt trying to make my system louder, now in my present car I'm on my second system and I want to get louder. but the system is in the trunk. I know no matter what I do it wont be as loud as in a hatchback. Is it possible to make a spl vehicle in a sedan. Are spl numbers as high as 150 achieveable in a trunk? My system is fairly loud now,I hit 137.8 at a local shop with my old system. but that was with 880 watts rms to a 15. I was'nt to impressed cause some guys were hitting 5-10 db more, with nearly the same wattage. I hav…

Whats up SSA. Im currently in the middle of my full system install and just took out the stock speakers today. My car has stock 6.5 Infinity components in the doors (woofer and tweeter mounted seperately) and it looks like it has a decent speaker mount/baffle whatever it is called. On the inside of the mount it specifies that it is composed of Polycarbonate with 10% Glass Fiber. I will be replacing them with a JBL P660C component system and was wondering if I would have good results using the stock speaker mount to install them. The new speakers are considerably more powerful and I will be sending ~120watts to them, I imagine the stock ones were seeing less than 45. …

I realize this is somewhat subwoofer dependent, but what are the best tuning frequencies for different goals like spl or sq. Also what would be a good way to match a subwoofer to the goals, T/S parameters? Any help would be appreciated, thanks.

I'm down for a few day for recovery from a surgery. So I'm brainstorming about my front stage. 99 2dr blazer is the vehicle. Right now I'm thinking about loading my pillars will multiple full range drivers. Not really looking for super ess que but half assed decent imaging and response. The sub stage is going to be decently loud so I need loud up front. Right now, I'm looking at 3-4 of these per pillar. I really like the look of these too. http://www.parts-express.com/pe/showdetl.cfm?partnumber=295-352 Possibly four of these. http://www.parts-express.com/pe/showdetl.cfm?partnumber=290-226 Then I like the idea of 6 of these in each pillar but I need to make su…

Linked... http://forums.caraudio.com/vb/showthread.php?t=120381 just wanted to spread the word in case you didn't see the pics!!! NG

We will be finishing up on my son's car soon and I have been wanting to wall-up my ride for a while now. I have a '93 T-Bird and I really have no need for the back seat. I have thought about a newer vehicle, but the old bird runs and drives great and I work very close to home. I allready have a pair of Saz-2000 amps and 150' of 1/0 welding cable. I am deciding as I write this about the SA-15 Presale. My thoughts about the wall are as follows: From a rough measurement I have 31-31.5" height 42" width 22-23" depth These measurements should give around 14.75cu' gross I would like a slot port centered with a measurement of about 29.5" high and a width of 6" thats 177" at alm…

Hey guys i was just wondering do you have to break in subwoofers?

Like the topic says!

The goal of this topic is to discuss the possible effects fiberglassing the inside of a subwoofer enclosure has on the sound? I am currently building my enclosure and am using fiberglass to make the box more ridged, prevent air leaks, prevent flexing, raise the boxes failure point of the box, and I just like building things heavy duty. I honestly never thought about the fiberglass effecting the sound until Pork Chop brought it up last night. I used the search function but did not find anything about effects on sound from fiberglassing an enclosure. I would like to hear some opinions about this from people that have experience with a fiberglassed sub box. I would also …