SPL & SQ / Fabrication

Looking for some tips on the trunk set-up. I have an 18" BL in there currently that is upfiring as it is the only arrangement I could use and still get it in the trunk. I'm looking at switching to a 15" though and can change it around if you guys have tried anything that works well. Firing into seats, firing back, port arrangement. stuff like that that I was unable to with the 18". Looking to save some time before I start tuning!! maybe you guys have had some good tips for me to start with. Any other good trunk tips would be appreciated to. If I compete with this in my car, it'll be a first. I've typically only competed with hatchbacks

So I couldn't sleep last night and decided to start designing the box I want to build for my 4 SA-10s that im getting in next week. Thought I'd post up the pics.... Also, After discussing yesterday with a few of you and trying to decide how to do port area and everything with some aero ports, I decided on the (4) 4" aero ports.. But then after I designed it and everything I realized that the tuning you guys said was about 39hz.... and Sundown recommends 30-35hz for these subs.. 39hz was like the only tuning we could get to work in order to get enough port area for my setup.. So I wanted to make sure before I buy everything and build this,.. Are the subs going to do/sound …

I want to tune low for my nightshade 18. How big should the box be after displacements? Port area? Tuning? Thanks!

Like the title says, im building a new speakerbag. The fun of causing mischief at the mall and walmart n stuff has disappeared, I want this one for something easily movable, for bragging rights, but mostly as my room system. The backpack aspect makes it more fun =) I am purchasing 12 bazooka OEM 5" subwoofer/midbass drivers, and three 20wrms x2ch Class T amps. I have my two previous batteries (12v Motorcyle battery, 12.5v modem battery) to power the amps, they run on 12v. I have four 5.25" mid/highs speakers already, and will add foam baffles to finish those off If i can work them in. I'm thinking (8) 5's isobaric, sealed, w/ polyfill, in .5cuft. I'm not really looking f…

aight. i have 3 12" california profiles. i have 3 custom 1/2 mdf wood boxes. there in a ranger single cab. i have 2 behind the seats and one where the center floor console/ cup holders were. i dont have the exact specs but there .40-.50 cu. ft. of airspace for each. the subs need 1.25 cu. ft. of airspace, but there just temporary till i get sum new ones. well my question is..they really dont have any excursion at all. they really bump but dont really move. i figured its cuz of the super small boxes. and probally cuz i didn't put any poly fill in em.or maybe cuz there low rated subs, they have like 50 rms and 350 watts peak but if i get sum 12" kicker cvr's or even some sh…

Well chaps I'm not 100% happpy with the SPL of my box, its 16.5cuft before displacement, and tuned onto 30hz, port area is 8.3in^2 per cuft, now recommended space for the subs is 6.5 per driver, and I presume port area should be 10^2inches per cuft, so should I line the entire inside of the box with an extra skin of MDF(flex is another issue except on the front baffle) this will reduce area, and also should I change the port for a larger one on the same tuning?? Any advice greatly appreciated lads

I have yet to personally use an RTA for my own personal use so let's see if I get this right- I want to use Pink noise because that is generated to play how our ears perceive sound. When analyzing what pink noise looks like on a computer, it appears from 20hz-20khz, for every octave from 20hz, the amplitude drops 3db. So, at 20khz, it's very low compared to 20hz but our ears must be very sensitive there(if you can hear it) to perceive a flat response. So, when i go to RTA my front stage, is my goal to also (if it were perfectly possible) to achieve a full range reading exactly how pink noise is generated? 3db drop for every octave up? In the end, I would assu…

Has anyone tried this when they were bored or may just know what happens if you take a ported box and install 2 ports in the box, one tuned to let's say 30 hz and the other at 45 hz. I'm just curious as to what happens. Does the box react as if there is a major air leak? Do the port's tuning medium come into play and output a tuned frequency of 38hz for this example?

I am running rookie sq in iasca. I was wondering if they have any rules in the sq division regarding vehicle builds. Specifically on caps, # of amps, wiring. I know they do for idbl, but I cant find anything on their website about sq builds. Thanks for any help.

i just traded my one 12" MTX 8000 series for 2 10" MTX 6000 series (4 ohm). sounds like i got screwed but the 10 sounds so much better. now i want to get an enclosure for both because the guy i traded with only had an enclosure for one. the enclosure it is in now is about 1.1 cu. ft. it sounds pretty good, gets decently low and decently loud, but doesnt really exceed in either category. i listen to all kinds of rock and some rap occasionally. so i want an LSQ setup. i cant decide whether i want to go ported yet or not. i'd love to but not sure i have the money because i dont have the knowledge to build my own. i am just wondering what the perfect size sealed and port…

I don't fully understand Port Velocity. Using BBP I can figure the velocity but at what are the acceptable limits prior to encountering negative effects?

Alright, iv basically all over the map trying to consider what type of subs i wanted. Iv made up my mind now and i kind of wanted to know your opinion. I was thinking about going with two Fi 12"Q's, OR two Fi 15" Q's in a ported box, running off a Crescendo BC2000D. Now in order to eliminate trunk rattle, i was told sealing it off from the trunk and firing it forward was a good idea. The only problem is that i cant fold my rear seats down, now i do have the option of buying rear folding seats for about $300. I guess i dont really have a specific question.. just tell me what you think, any improvements or different ideas you think would work best. Since im…

Little problems nothing serious. Built enclousure for some 18inchrolling zcons limited on space but couldnt pass the offer up on some z's. Box is small for ported box and tuned high with a smallamount of port are, basically if you could mess a box up and screw yourself over in output this is the box. 180inchs of port area withc4.5cubes per 18 tuned at 40hz not that happy with the output even on a .5ohm load on a sendo with electrical back it up. My question iss would i see a day and night difference if i built a single 18 box the biggest i could build out of my space? Pics of the franksteinvbox xustom finish on it.

Alright guys i'm in the market for a system ( my first ) I have a 98 Z-71 EXT Cab so i have more room than needed. I'm wanting 2 fi btl 15s & 2 saz3000d's or 2 1500ds.....the problem i'm having is idk how to build a box lol Nor do i know what kind of wiring to get, if anybody can help me please help

I have 2 SSA Evil 15s My box Outside Dimensions is 41W x 31H x 21D / Double Baffled all the way arournd 1.5" Birch My box Inside Dimensions is 38W x 28H x 18D I have 2 Braces 1.5" x 3.5" x 38" and 1.5" x 3.5" x 18" I need help with designing a port. I would like to be tuned to 28hz / As you can see my Port is too Small. I dont want to remake the box i would like to Remove the Port and Fix this Box. Box inside Cubic Feet Empty 11.08 Brace Cubic Feet .17 Both Subs Displacement / 2 x .22each = .44

I'm going to build a box for a buddy of mine that has a 1988 Camaro Iroc-Z. It's not going to be in the wheel weld as of other boxes. But right behind the rear seats. In this picture where the amp is located, there will be an enclosure for them, and it won't cover up the whole trunk area. I am going to use dual 4" Areo ports, and I was wondering how long will they have to be to have a tuning of 32-32hz. I'm thinking 1.6-8 cubes in total for both subs, and the amp I am using is a Polk Audio 4channel 800 watt amp that will be bridged to run at 4 ohms. The aim is mostly for SPL since there is no true SQ. But he would like to be able to listen to a variety of music, such as:…

I have an old sub box that came with an RE SX15 I bought used. It is 3.1 cu ft net before driver displacement. It has 2-3" aero ports in it. 9" long. I used it before with the sx15 wired at 2 ohms on my saz-1500d. I never heard any port noise, but it didn't sound great. I later built a 4.25 net cu ft box for the RE tuned to 30 hz. It sounds great. Well I think I have a buyer for the RE and was wondering if an SA15 would work in the old box. It's about the right volume and tuning would be right about 35hz(recommended) but it's seriously low on port volume. I was also thinking I could put a third port in it for burps and bump tuning from 35-45hz. Not to mention increasing …

Ok, so now I'm hooked. I have the 2 12" zcon's in and the 2500d. Now I want more. Have an eye on a ns-1. What will I need to do for a competition box? Keep in mind that I do have a s-10 extended cab 3 door and it is a daily driver that I want to make into a competition truck. Current box is supposedly 4.75^3 at 36hz? I think the hz is correct. Have to double check. It was designed by ram-designs. It's a angled back or trapezoid style box. Top is 14x43, bottom is 20x43 and it is 18 tall. I come uP with 5.4^3 after sub displacement. What do I need to do? What is the difference in a comp box vs a ported box?

I'm thinking about going to a meca event and try and place....but wat class will I be in 2-18's, 4000watts, two 300 amp fuses( can go lower if need to) and I have no idea if I have a street Box or not...trying to start going to comps so I can rep these ETHOS

Has anyone used eDead for sound dampening. I know that their subwoofers arent great, is this true with their dampening materials as well? I won't pay the outrageous price for Dynamat, I can't afford to spend $400+ to do my car. I can get eDead for .80 cents per square foot. Even if i had to double it up, it would still be considerably cheaper than Dynamat, Second Skin, etc. What do you guys think?

I am looking for a box design for 3 audioque HDC3 10's my trunk specs H 16 in L 43 in W 36 in the mouth of my trunk is 44in looking for a 4.5 cuft box tuned to 36/37 hertz i don't know how much port area though,

So my build calls for my 4" aeros to be about 38" long so I have to do some piping in my box with 90 and 45 degree turns. When measuring I'm assuming I stay in the middle the whole time and measure flare tip to tip? The turns are what throw me off when measuring. Thanks guys

i had a rockford fosgate t1d415 before and ive been messing around with custom boxes for a little while. i didnt know too much about winisd back then. luckily my first box i built for it played very nice and didnt have any port noise. i tuned it around 34hz if i remember correctly. i loved how low it could get down. i played into the lower/mid 20's (i know i was playing a bit lower than the tuning freq) and loved it. this time around im going to design a box for my fi sp4 15. it should be here any day (i hope) and i'd like to be tuned low. heres my current design for it. can you guys let me know if my design is ok. i know the port is a little skinny but it looks like the …

i finished putting this togethre right now... LMK what you think. I'm uneasy about the tuning freq because i was unfamiliar with the calc. i used. since the box is wider, i can now have a good 26" of port area. anything wrong with what you see? the sub itself is .3 cubic ft but i will add more baffle to compensate

i have 2 level 4 xl's in my trunk in a 9 cube box and its tuned to around 32 or 33 hurtz and i was wondering if anyone had song songs that would go with that tune? i know money man hits hard run quickly is insanely low just love that feeling