SPL & SQ / Fabrication

Hi there, hope it s not too early to start asking for help. I've got 2 RE XXX v3 18s but running only 1 @ the moment cause there is no room for 2 so I m getting them resized to 15s. Could somebody please help me with the design of a enclosure for 2 RE XXX v3 15s??? external measurement would have to be max. W 36 H 24 D 28 Dropping low but musical ... Thank u in advance, Andre

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i am trying my hand at some horn's for the mids from my re6.5 comp set, the tweeters blew so i got new comps coming, and desided to put these in the living room. so how does this look? anything you see wrong or horn tips would be greatly appreciated

Im pretty sure Ive seen this before. wondering how the port length is calculated. say the port opening is 3.75x13, Id assume when it splits Id make each continuance of the port 1.875x13. do I measure the length of the first part before it splits, and add to it the length of the part after the split to get the overall length. do I calculate the length as if I were running 2 1.875x13 ports, or a single 3.75x13 port. with the box volume and tuning I was using, they were very similar, 29.6 for one and 28.92 for the other scenario, so either one would end up close enough, but Id like the know the correct way. if either of these are correct.

Ok i need some more help trying to figger out how big to make my port, it is for two sa-15's on the saz-1500d .v2 in a 97 Blazer. The box will be 19H, 38W, and 26D, subs up and port back. But i wanna put the port on the bottom centered and i was going to make the port. 6H, 20W, and 19L, but that didnt give me enuff port area and i want it somewhere between 32 to 38 or so Hz. So if someone could please help me out it would be much appreciative thanks.

Big dilemma, trunk car im working with. I have 7.445 Cu Ft internal area for use if i fire up but the box will be removabable so i can grab my spare tire if i need to. Will up firing in a trunk lose me alot of spl or clarity? Which direction should i fire the port if im making this setup. Also for two RE SX 15's how much port area should be used? The port area is a very limiting factor as its robbing the little amount of area i have. The other way i can do is rear firing but i must make a two piece box to fit it in the trunk. The subs would only be 2 inches from the rear lid of the trunk. I gain .2 cu ft from switching but the amount of work would be substantial and i wou…

I just finished my box for my fi btl and now I'm looking for something to cover it but not sure what yet. I've looked at CF and Carpet together (having the entire box black carpet with the fi bomb sticker as a cutout with CF over top) and thought about bed liner but I've never tired either and I'm not sue what would be the best look and if there are any more ideas out there throw them at me in open to anything.

I'm assuming if i had one of those woofer testers to pull the T/S parameters of a speaker, it would pull different specs if i took a single DVC subwoofer and tested it wired in series, then tested it again in parallel. Well, i dont have one so i'm gonna rely on those experienced here to relay some info to me. I will be using 4 subwoofers, 2 subwoofers per amp. Each pair of subs are dual 1 ohm. I have 2 ways of wiring this- 1 - Parallel both subs then series them to the amp 2 - Series both subs then parallel them to the amp Is there a difference in SPL potential between the 2? this info is pertaining to a meter, not the ear. I notice when looking at specs of subs, in gener…

Plan on running a pair of M1a's strapped @ 2 ohms for daily/bassrace, and @ 0.5 ohm for burps. Just under 3 cubic feet tuned @ 38hz 72.5 sq in. of port Does it look adequate?

I understand that if you have the same setup you need to double your wattage each time to get 3 db louder. My question is when you get up to say 4kw and you have to double it to 8kw to get 3 db louder is there a significant difference in loudness? Is it the same audible difference than say the same setup at 200 rms is doubled to 400 rms.

ok heres the deal. i my box is sub and port same direction as of now i have them firing port up sub up. and there is around 4 inchs space before the trunk lid, and i am scoring a 148. i think i maybe able to squeeze the box in sub back port back.. but i will only have 2 or 3 inchs between the subs and port and wall of my trunk. if i change it up now.. and lose my score then im fucked for this weekend. i have talked with another town car SPL guy. and he stated, in all his testing center port back. he lost 3 DB. from having port on one side, and lost .5 db's on the dash (meca) with sub up port up i guess my short question is.. and at this point its just a g…

The vehicle is an '89 mustang (hatch). Im wanting to keep the enclosure at right around 10 cubes to keep my imp rise at about one ohm but want a different port placement. it is possible that this may just be a wall but im looking for the best gains, what should i do? the build is with four FI SSd 12's thanks guise.

I have a 4 cubic foot box that i would like to install two 4" pvc ports in... How do i go about figuring it out?

I just purchased a SSA Xcon 10 and will be putting it in my 350z. My question is.. Would a premade enclosure from "Zenclosures.com" be fine for it? Heres the link to the enclosure http://www.zenclosures.com/Nissan-350Z-Subwoofer-Box-p/z110ar.htm Any input would be greatly appreciated! Kyle

Hello, At the moment, I have 2 Kenwood 12's (4 Ohms, 400rms) in separate ported enclosures that I built. It was my first time building a sub enclosure, and I don't think I did it right. I have an alpine MRP-M500 amp running at 300wrms at 4ohms. I listen to rap, and when I play a song that goes really low (Put on- jeezy for example) the lowest note is really quiet. I'm assuming its a combination of the wrong box specs and them being underpowered? I'm planning on getting a new system in a couple months, but until then, I'd like to fix my current one and in the process, I'd be getting another box build under my belt to practice for my next one. My goal is to make it louder,…

im getting my system installed next week. Am i going to get bored of it after a while? Will it not seem as loud as it was when i first put it in because i got used to it? I am going to run 1500 watts rms. i have a sundown sae 1200d, 12in fi bl fully loaded, 0 gauge amp kit, and im going to do the big 3 upgrade. This is all going in a 2010 maxima

im going to have two FI BL 15s and i want a good enclosure. my max dimensions are 50 inches in width, 28 inches in height, and 25 inches in depth, and i kinda wanted a design plan such as the port dimensions and should i go double or single baffle?

Posted this on *** as thats where I found a box design I'm interesed in, but thought I'd ask here too asn see what you aLL THINK... I want to redo my system AGAIN and I'm slowly stackin parts to get it all ready... I have most of the wiring (RCAs, lots of 0/1, 4 and 8 ga wire, tons of connecters, etc ) most of the major stuff (I have 2 sets of RE XXX Componets, the 4 12" RE XXX D2s older style, 1 SAZ-2000D, buying 3 more and I guess I need 2 SAX-125.2s for my Mids and Tweets), now my biggest problem is how to fit it all and make it all look cool.. Again the ride is a 2000 S-10 Blazer and like I said I want to put in 4 12" XXX D2s in a vented enclosure for ""SQL&a…

ok so i really dont trust most of the box calcs. online so i've been researching formulas and anything i need to know about designing on my own. so anyone with advice please put in your two cents..... tell me if i got this much figured out: 1). to come up with the ft^3 of the box you multiply length x width x height using the inner dimensions. then take the total of that and divide by 1728 which is the in^3 of 1 cubic ft. 2). then to factor in port, bracing, and driver displacement you use the L x W x H on each item and subtract it from the ft^3 3). for box's with a slanted front. for example the top is 5" and the bottom is 15" you find the average of them by adding them…

I'm currently thinking about building a box for a 12 btl with both the sub and the port aimed into the cabin, sealing off the trunk from the cabin. I have looked at tons of boxes doing this but they all port on either the right or left side of the box. I often have 4 people in my car so this would mean the seats would have to remain up giving the port very little room to breath. My middle seat has an arm rest that comes down and my idea was to have the box port right there so that i can just put the arm rest down and give the port a place to breath. My question is can i port the box in the middle and place the sub to either the right or left of the port. I don't have a i…

Wonderin whats.better for 4 12 sa's d4.They will be going in a 99 crownvic.thank u in advance

not for sure where or when this happened, james herren sent it to my phone, hence the crappy quality. anyway, figured it would be good for some laughs. and yep, it's a 172.2db run. wheeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee

I started my base mold about a week ago, and popped it out after the second layer. Right now im on my fourth layer for the base, and it seems to be getting really stiff. Probably going to end up doing 2 more layers. I have a question though, does fiberglassing polyiester rope to the inside of the box help stiffen it up? i thought I read about that on here but im not sure.

Know that my 270A alternator has been ordered I'll be ordering a second FI BL 15 for my car. I was wanting to get you thought on this parameters

I just copped 2 new 15" Alpine "Hype"-Rs for $200. Wanna play around with them & just see what all they can do. Ive always wanted to just see what they sound like cause I NEVER have. Ive been told the lows suck for the R so what kind of box could help put for that? 7cuft box tuned to 34 or 35hz? P.S. NOT my daily subs...