SPL & SQ / Fabrication

Can someone check these calculations? Height:20 Width:38 Depth:14 Port Length:25 1/8" Port Width:3" These are externals. Thanks for any help

Ive been wanting a 6thorder for a while. I wanna try to build one for one of my sundown sa-15s i dont how big to make the chambers or the tuning. I listen to all rap and songs with low bass. Idk what do do someone help me. And what types of wood can i use?

Want to learn how to fiberglass? check this tutorial out, he knows what he is doing. http://www.automotiveforums.com/vbulletin/...ad.php?t=416484

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?

hey all i just got metered at the florida spl/ db drag event in clear water and managed to hit a 133.6 on the TL with an fi x 12 and 350 watts. ooo and everyone should really experience mp3 pimps car first hand it is REDICULOUS!!!!!

Wassup guys, I just got in my possession 2 18 inch Aq hdc3's bnib. I will be walling my truck and my deminsions I came up with are 51'' width 38'' height 24'' deep. With 1.5in thick walls, I get 20.4 cubes. I gave my self alittle wiggle room for the height and width. I will be tuning to 36 hz with a 9x38 port that is 20.5 in long. It will be braced and before bracing will come out to about 8.2-8.4 per sub, that is after port displacement. If anyone could run those specs I would greatly appreciate it. This will be going into a 2000 gmc Sierra ext cab. They will be powered by 2 crescendo bc2000ds at 4ohm strapped daily then 1 ohm strapped for comps I'm looking fo…

its a box for two Fi 15 ssd's. the dimensions i have are 42"w X 20"h X 22"D total of 8.8cu.ft and total of around 8.5cu.ft with sub displacement. and a port 8"w X 8"h X 13"d would tune it to 32hz. thats the calculations i came up with,i just want to double check before i go cutting up mdf.

Just to start off, I'm building this for the heck of it and recently picked up an inexpensive Memphis audio 15-ms84 to build a box around. This box might be placed in a car just to see what it will do but will stay mostly in the office. The pictures should give you an idea what I'm trying to do, and should show most of the specs of the box. Basically using an 8.25" x 1" slot port that is 23" in length with a tuning around 38 hz. The box volume is .59 f^3. The response curve seemed to have an nice flat-ish shape that hopefully will make it sound 'full' to the Fs. If I'm doing something completely wrong, please let me know - Gently please. Thanks John

Been bumping my 15" SSD for a while now and I'm still loving every second of it except for one thing. The rattle. Its not the trunk rattling its my back deck speakers, and the reason their rattling so bad is because the sub is firing up towards them. My dad had to buy a special bolt and locking nut to keep the screws from backing out because every time i listened to it the screws holding the back deck speakers in backed out about 2 inches. Its really annoying, you either have to listen music with the bass so low it doesn't rattle them or so loud you can't hear the rattle. *And I'm not taking the back deck speakers out they help fill the cabin with highs So here is my plan…

I had a 4th order bandpass box designed for me, but he didn't give me an output graph or tuning frequency or anything else. So before I build the box, I'd like to know what the output graph looks like (if there are any high/low peaks/dips in the curve at certain frequencies). How can I figure out what the 'range' of the box/sub is? I'm not sure how to ask this, but I'd like to know the frequency band width. Whats the lowest the sub should play and the highest the sub should play. So I know where to set my subsonic//lowpass filters. Can anyone help me? Let me know what measurements you might need or just tell me how I can calculate it.

I recently changed the enclosure of my sub. Nothing else has changed : same electrical, same amp,... The old one was too small, and badly tuned (too high). The new one is really a good one. When I made the change, I was not so happy with it. And after a few days I start to like it more and more! Could it be that the sub need to adapt to its enclosure for some time before playing as it should ? Maybe I am just getting used to it! What do you think about that?

ok, i'm gonna risk one hell of a flamming here and ask you guys. i was nomeened R-tard of the month on CA.com for saying this so chances are it's gonna happen here too, but what the hell K my question is can you guys hear the difference between a 4 ohm and 1 ohm load? now im not talking about sitting in someone else's car and knowing it, but if you have a 2x2 sub and wiring it to 1 and 4 ohm load. i have tried it with a two different amps(a 2 channel in 2 ohm bridge) and my current RF bd 1000.1. although on a 1 ohm load and lower it ponds like a bastard it just sounds too off, sort of muddy... this all applies if the amp is stable on those loads of course just curious...

i have a 1997 mercury mountaineer with 2 fi q18's DRUMMING~! they are powered by a t20001bd rockford. i am losing so much pressure out of the back glass do to flexing. do they make clamps for the back hatch to hold it down? its a daily box in now and will future be a crx style spl box. i currently have a 12 cube crx style box with 120 sq. inch of port. thanks for any and all help! Damon

I want to go huge, so im goin to. I would like to get: Sub-Fi BTL 15" or 2 12" Amp-Sundown Audio SAZ1500D or Soundstream DTR1.3400 Alt-Iraggi Battery-Xs power (size unknown) or kinetic I dont know what to do about electrical, i know am going to do the big 3, i also know i need a new alt prob. Please help me out here, i want it to be cheap but i want good quality stuff to, i also want to do really well, ive been to 3 SPL comps and there sick, i loved seeing wat people did with their cars and what not. If you think there is a better sub or amp, let me know for a speakers i wont pay more than 500 for one and 750 for 2, for a amp i will not pay over 1000. If you can help it…

I would like to know how many or even if anyone uses a 4 inch aeroport for a 12 inch sub without any problems. Reason i ask is because i built a 2 cu. ft. box for my audiopulse axis with a 4 inch aeroport tuned to ~34 hz and it sounds fine, only up to a certain point though. I don't like the noise it makes, i guess that's what chuffing sounds like and i can't stand it so i turn the volume down. I was also only using a saz 1000d on it with absolutely horrible electrical so there's no way i was reaching its limits with it's insane power requirement. Now i know for a fact that that's not enough port area but i would still like to know if anyone uses a 4" and gets away with …

Just made my first go at this google sketch up and was wanting some feed back to see if i need to make any corrections i'm building for either 3 fi bl 12's or 3 psi platform 2 12's heres a pic of what i have came up with so far

Hi I'm making my box for 2 12" Fi SSDs and I can get my dimensions from the RE box calculator but how could I calculate a double baffle into it? I have been thinkin about it and I can not think of how I can calculate it and keep it at 4 cubes.

i blended the sub down to fit in with the front stage and all i can hear is Loose Plastic panels Rattelling... s0o0o0o0o i have spent the last 2 nights re-doing the front doors & the thinggy in the headliner of the explorer... now all the Rattelling is behind me... Dammmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm it...

Stupidly I bought an 18 Fi BL and didn't realize I couldn't fit the recommended box inside my trunk...its anywhere between 4-4.5 cubic ft..Is there anyway I can build a new box similar in size that will increase the current SPL levels and help not suffocate the sub-woofer so much?

Why 5000 RMS On Amplifier 2 T20001 Isn

Gettin ready to start on a new build. Will consist of: 15" Sundown Nightshade D2 Alphasonik 1000HCA (Possibly saz1500) All 1/0 Exide Orbital Deep Cycle Damplifier Pro will be installed on all doors and on hatch and on the floor from the back seats back. I have more for rest of truck but probably wont have time to get it all on at first. I want to be able to put up some good numbers on the TL so what kind of design you got for me? Should I do a slot port or aero? About what size box and tuned to what? Thanks 3 cu ft tuned to 36hz with 3 4" flares?

Hey guys! This is my first post on this forum, so please excuse me if I'm breaking any protocol. Anywho, if anyone's interested in Digital Designs' new T series subs, check out the link below in which I posted my build thread. I realize it's linked to Elemental Designs, but that's only because I was initially considering the use of their 8" sub. I can't compare the two, but let's just say that I am THRILLED with the performance, sound, and appearance of DD's T1508. I couldn't ask for anything more... well not from an 8" sub. Don't take that the wrong way, though. If I were to compare to anything at the local Best Buy, I'd have to be looking at a single 12" or a pair of 10…

well I have seen this on ROE in some of the vids is there anyone who can hook me up with this for a comp comeing up at the end of this week would like to use it for steet beats and does anyone know what freq. it is at. thanks P.S. if this is in the wrong section sorry.

my question is im trying to make a box for 2 18" btls dimentions are 49"L x 24"T x 27"D here are some rough sketches from paint how should i go about bracing it i know that i need to(or do i?) since im planing on running them on 2 SAZ-3000D and i will doublebaffle the top where the speakers will be mounted would simply corner bracing like in this pic be enuff and also placing a small block of mdf on 1 or both sides of the port to support the middle of the box

need some help with a box for a 98 explorer for 2 15'' crystal cmpx215 wood like it ported to 26hz r 30hz i have 41''w 18''tall 20''deep wood like to do 4'' pvc pipe let me no if you can help me out i think i have about 7.4cf i wont to do subs up and ports back i think