Quentin Jarrell

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.

Production run will be ordered within the next two weeks. So mid to late January.

Production run will be ordered within the next two weeks. So mid to late January.

According to three different FEA programs xmax at 82% BL (10% distortion) is roughly 28mm. At 70% BL (20% distortion) should be between 30 and 35. I'll wait for Klippel results to know exactly. I could have abused the sub for a video but I needed a sub in good working order for testing (a crumpled coil wont make for good T/S testing) and really didn't feel like reconing it. I'm going to make a few changes but so far I think its a pretty decent sub for $350ish bucks.

I did two flatline 12's in an M5 on a IA 20.1 and the coils got pretty stinky with the gain wide open. I wouldn't do anymore than 750 rms.

He's a vendor here. The regulars know what he's talking about.