SPL & SQ / Fabrication

This will be my first wall build, I've been doing a lot of reading and looking at build logs. I should start by saying the plan is 2-3 (if I can fit 3) RE XXX 15's, on either a DC Audio 12k or Stetsom 14K. I think I'm going to go with Baltic Birch for weight and strength, I am seeing guys using 2 by 4 bracing, also seeing them use it for the back of the wall outside, what is the purpose? is it needed? what other ways would you strengthen the wall or face? the subs weigh 76lbs a piece. I was thinking 3-4 layer front face, double layer everywhere else, fully resin the box. How much bracing would you recommend? If you have pics or anything else you might recommend I'm open …

alrite i started a thread on here not to long ago abou tthe elastomeric coating that steve meade used on the inside of the his box and didntt get many replys. i am pretty much done with glassin the inside of my box but i havent started sanding yet. i read about painting the inside with 2 stage paint making it alot louder becasue the waves travel better across a smooth hard surface. but the only problem is i would have to sand the inside to no end. i was plannin on sanding it to an extent and then sprayin it with spray filler primer and going from there. but i have a deadline in a few months and i dont know if this is going to be possible. another factor is that i will bea…

This is for 2-10" Alpine Type-R subs (SWR-1022D), and will be powered by an Alpine MRD-M501 amplifier rated at 550W into 2 ohm mono. These are my inside dimensions: Height 10" Depth 10" Width 15.25" Total is .88 ft^3/sub Total outside box dimensions are: 11"x11"x32" I need to put this box underneath a rear strut bar and from the bottom of the bar to the trunk floor is 11 1/2". Will this work or should I scrap the strut bar and build a taller box? Any help or suggestions are appreciated. Ed

I've been enjoying my old school set up, Powered by Old School Precision Power PC2150 for sub duty and a PC275 for my mids and highs, both amps are from 1997 never been repaired original void stickers still in tacked. I'm running 2 NOS 12'' Rockford Fosgate P1's, there the ones with a big plastic cover over the magnet, to make the magnets look big, sealed boxes. Let me tell you those subs sound incredible with those old school PPI amps. My head unit is an old school Alpine CDA - 7965 year 2001 sound quality deck, has no deck power, you can only use amplifiers with this deck. I'm running a Tsanmi 40 FARID CAP. I have a old school Audio Control cross over in the glove …

I don't have a disc to install windows on my mac, and I kinda want to use my TermLab. Does anyone know how to do this without using bootcamp or a visualizer?

well its that time of year again, when i have some money comin in. Hopefully this will be finished up in the next few months. its goin in my 84 cutlass. 2 Mach 5 MJ-18, off of a AQ 1200. the box is 10.97 cubes @ 34 hz, and 175 sq. inches of port. the bracing in the pics isnt what its actually gonna be like, i got in a hurry and just threw it in, ill be glassin the inside and usin thread rod. the corners will also have 45's. oh and its out of 1'' mdf. Comments or suggestions appreciated. demensions are 42 wide, 29 tall and 24 deep. It seems that a box that big with that much port would have horrible port noise, but supprising in the car none of my boxes have have ve…

Im gonna make a box for a buddy of mine and he wants it to be 8cu ft and tuned to 34hz...i was wondering the size of the aeroport i need...lenth, and what size pipe should i do

Is the correct way the measure a port that has a 45 in it or do you measure like a standard L-Port.

The Car:2000 Maxima The build i talk to some guys from americanbass usa they sending me 4 12's sq 600 rms subs im gonna need a amp to push them they have a 1000.1 they wana send me but i need to worry about the box build 1st thats where you guys come in..lol i need to build a box for 4 12;s ported threw my rear deck now on a ported enclosure these speaker need a box volume of 1.5 Cu Ft Now i Need to figure out how would i tuned this box out to 40hz thats the max the speakers can hold so i wana give it alls its got..BUT i have no clue on tuneing a box to 40 hz i can build a reg box to 12 ported slot in the middle but on the whole 4 12's i have no clue i hopeing one of ya c…

currently i have a 2.5cuft box tuned around 33hz with a 1300.1 percision power amp running at 1 ohm. i have just installed a pair of polk components in the front with a powerbass 2ch giving each side about 100rms. so now the sub isnt the main part of my system like it was before when i only had 30rms to the front doors that would get un audible when the sub hit. the idea for the new box is about 4cuft tuned around 28hz or so. my biggest question is how big should my port be? what are the advantages of 12" vs 16" per cube? would 12" be more snappy vs a 16" which would move more air? currently the box is directly behind the drivers seat with the sub and port facing the dr…

i have a fi bl 15 dual 2 with flatwind and cooling. it's going in a trailblazer; although i have a lot of room i dont want to use it all. i need some help deciding on the dimensions of my box and how i want it tuned. I want it to sound good but get really loud. i listen to all kinds of music if that matters. any help would be appreciated.

Does anyone know a formula that can be used to calculate the optimal box volume and tuning frequency for a particular subwoofer using the T/S parameters given by the manufacturer?

I tried to search for this, but couldn't find what I'm looking for.. I drive an '06 KIA Spectra. I'm having good luck with a Rockford P3 dual 2 15" in a slot ported enclosure, tuned to about 32HZ. I'm running that with a Cadence ZRS7000D. I understand the machanics behind sealing off the trunk, but I've never listened to sealed off trunk car. I'm wondering if they are purely for muscle, or can they be musical? Is it worth putting in the effort if I don't drive around with my seat folded down?? My poor trunk can't handle the pressure!

I want my subs to face up with the port up like one of my previous boxes. I cant seem to get a lot of input and like Ive said previously the pro designers dotn wanna mess with a camaro enclosure. Assuming ive done my math correctly does this look like a suitable enclosure? I just started using sketchup so I have figured everything out so nothings 45'ed or anything.

Alright so ive been doing spl for three years now on a team and I just bought two new dd audio digital designs m3b amps strapped on my incriminator audio 18ns and well after playing one song for a short period of time they locked up and burnt the coils are these speakers really true too there power because I was told they could handle 3000 whatts each easy and I dont have the right current going too them I have two 100 batts in back and a heavy duty alt thats running 14.6 volts and drops too 12.8 on lows please help me im beyound frustrated at this point.

I would like to make a vented box similar to this with the top ledge on it. The pic attached is of my current box. The front of the box is to the right. I'd like to make a ported box in the same shape with two ports each pointing out of the top directly through my open 6x8 speaker holes in the deck.

Yes, i've used a table saw before, before anyone asks lol. But never for a box with mdf. The table saws i've used have always been pretty big, like shop table saws. I recently borrowed a 10" table saw from a buddy who builds boxes with it, but it's small as hell. It's really small, especially for the box i'm making (the biggest sides are 39.5"x21"). I even put tables on two sides, to help support the wood as it goes along the blade. I used a circular saw to make the mdf as small as possible for the saw, cutting the 4x8 in (about) half. Everytime i take a piece across, it kicksback pretty bad. Now i know i'm not the first person to use a small table saw for a big project,…

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?

I know it's a long ways from anywhere, but if you happen to be close by.....come bump w/ us!

Just got done doing a system for my friend on a hifonics 1000 watt amp and a 15" l7 and the box he got is terrible it can't hit anything below 40 worth a damn. And he loves his lows. So I was wondering of anyone in NJ OR PA would like to get paid to build a box more suitable for the sub. Thank you

What do you guys think of the design? Its for a DC lvl 4 12'' sub How would I factor in a kerfed port to the design??? If the kerf is secured as an external portion of the port, will it affect tuning or require a change in design anywhere? Specs come to: -2 cubic feet before subs displacement -32.5hz tuning -36.25 sq inches of port area

Just looking for some help I guess. Mostly with the stock classes. The organization i was preparing for is looking like its just about dead (dbdrag). So im thinking it may be beneficial to build towards the rules of iasca. Anyone with experience competing in this format, I wouldnt mind a bit of help.

Hey guy I need a good beating song with a long bass line ( about 3 min) box is tuned to 32hz and my car peaks around 40-44 on burps. I need a song that will last 3 mins. I have a comp in the morning and there is a kaos class ( average spl score over the 3 mins) I haven't had any time to try any on a tl any one have any sugestons?

im makiing a temp system for now in my 95 grand prix. i am needing help on how much port area is ideal for these subs. going to be pushed by a alpine mrp1000 at 2 ohms. the sub is a brand new alpine type r 12. thank you for your time.

looking for some help with the enclosure i am planning to build in the rear seat of my accord. it is not going to be a wall but a ported box reall. i was just wondering how to face the subs and ports. like subs up ports forward and that kinda junk. well i guess i should have stated what im looking for. im looking for a loud daily driver.