Quentin Jarrell

I have dual 2 and dual 4 ohm coils. They will work on 10, 12, 15 frames. 18 cone has too much moving mass. $150 for each motor built to whatever size you want, plus shipping.

gain plots with 1,2,3 and 4 cubic foot sealed boxes along with the other ported boxes if you'd like to go that route.

your deminsions would be: 46 inches wide 36 inches high 3.5 inches deep at top 9.5 inches deep at bottom using 3/4 inch MDF gives you 4.44 cubic feet internally

Below are two popular enclosures that would fit in the room you provided. There were a few parameters that weren't listed on the Sundown site so I used a FEA program to calculate them so they may be a tad off but close enough that it shouldn't matter. The top is a BB4 alignment: 2.08 cubic feet tuned to 36 hertz with a f3 of 32.89 The bottom is a C4 alignment: 3.88 cubic feet tuned to 28.9 hertz with a f3 of 25.76 hertz. Because you are looking for the increased lower end I'd go with the C4 alignment. Group delay is much higher than the BB4 but it's not much higher than 28ms and it's only 20ms at 20 hz so it should be fine. Using Small's minimum port area formula you will want to use (2) 4 inch ports or 25.12 square inches of port 19 inches long. With sub displacement this should just fit and give you room between the sub and seat as I took off an inch and a half of the depth measurements you gave. I'd put the subs on the driver side and exit the port toward the passenger side. This is just my preferences someone else might have something else they might want to add.

If I get a little time I'll work up a few different alignments and you can input them in Winsd if you woul like to look at their response curve.

I took off 1.5 inches on the depth (I figured you didn't account for cone excursion) and I get roughly 4.25 cubic feet internal volume. I don't know the specs on the subs but I'm sure ported would be workable

Nothing unless you are using Mathcad or LEAP can tell you in vehicle response. Unless there is a new program that I'm not aware of.

You take any of these high end subs(the ones with no T/S parameters listed). Namely the ones with a qts of .3 and under and all the free programs out there are going to tell you that you are going to need a box under 1/2 a cubic feet. And when you plug in a decently sized volume you'll see a huge spike at tuning. This will cause folks to freak out and think something is wrong. So the easiest and best thing to do is tell people what to use. Nick Wright knows what he's doing. He designed the subs so he knows what box to put them in. And as far as modeling to know what to use in a certain vehicle, unless you are modeling using LEAP or another higher end modeling software that's not going to happen. All free or basic modeling software models in a Anechoic environment.

You haven't given the subs or the room available. So no one can tell you. You might be using JL w7 and get a f3 in the low 30's sealed. Or you might be using $40 pioneers and might only get a f3 of 40 in a sealed box. Or the "tard" that says side ports don't sound good might build you a shitty designed sealed box for the W7 and you might end up with a f3 in the 40's anyway. We needs specifics.

Are you utilizing a ski hole or just folding down the seats

Well I'd be damned.

It's a thingy with little knobs and blinky lights used in live sound to keep the loud parts of music not loud to keep from letting out the magic genie.

Give it time, with all these people installing these compression tweeters and so called pro drivers someone is gonna come out with a 12 volt compressor with an adjustable threshold gate. Which of course you'll have to purchase the extra tool to adjust the gate.

Fi still uses .7 ohm coils right? If you paralleled the coils then seriesed the sub's you'd have a 1.05 ohm final load

Is 600 the budget for the components alone, or for both the components and amp

You won't catch me breaking out the fiberglass shears for anywhere near the price you paid for your box.

The alpine x series were outsourced from Scanspeak and were derived from the revelators. 1,000 bucks isn't a horrible price if it was a really nice enclosure formed to fit under the strut tower bar wrapped in suede or vinyl. You didn't state the type of enclosure. Maybe it was just a plain box or maybe you and the salesman had your wires crossed. I find it hard to believe a shop would try to sell a square carpeted box for a grand.

Freaking awsome. Imagine how much time went into wiring all that up.

^^^^ where did that come from.

Yea, you could just type in numbers To get a graph that looks good to you. I personally prefer a BB4 alignment and use the neccesary algorithms and parameters to calculate the tuning and volume needed for the particular sub. If you are Truely interested in the why's and how's I'd recommend purchasing a copy of the Loudspeaker Cookbook.

Double post FAIL

There is a lot more to it than that but it's kinda pointless to to get into it with out working the data. For example a manufacturer has a 12" sub with an Re of say 2, a BL of 15, A moving mass of 350 grams, and an xmax of 30mm. Now this manufacture recommends a ported enclosure with volume of 1.5-3 cubic feet tuned to 28-35 hertz. The sub may graph out and work fine in an enclosure that's 1.5 feet tuned to 35 hertz or 3 cubic feet tuned to 28 hertz but it won't have enough motor force to control the moving mass to xmax in a 1.5 foot enclosure tuned to 28 hertz. These numbers are arbitrary but it's one reason you can't use a broad ranged enclosure recommendation.

There is a lot more to it than that but it's kinda pointless to to get into it with out working the data. For example a manufacturer has a 12" sub with an Re of say 2, a BL of 15, A moving mass of 350 grams, and an xmax of 30mm. Now this manufacture recommends a ported enclosure with volume of 1.5-3 cubic feet tuned to 28-35 hertz. The sub may graph out and work fine in an enclosure that's 1.5 feet tuned to 35 hertz or 3 cubic feet tuned to 28 hertz but it won't have enough motor force to control the moving mass to xmax in a 1.5 foot enclosure tuned to 28 hertz. These numbers are arbitrary but it's one reason you can't use a broad ranged enclosure recommendation.

Displacement creates output. If you want noticeably more output pick a sub with twice as much xmax as the W6. On paper without losses you will gain 3db in output.

I didn't have much time to fool with it so I just took some quick pics with the iphone. For size reference, 18 inch basket and 10 inch basket Once I get it together and broke in I have to send it to Arizona to put on a Klippel analyzer to verify parameters and to do AES power rating on it.