Tommythecat

~150 sq in.

Options.

A lot of these things just dont go together. High xmax and low power handling? Low Fs and high efficiency? Like I said before, aim for the performance you get from the 18. Fs in the 30Hz region, suitable xmax 15-20mm, ability to work in a 6-8 cu ft. box. Not to say this would be for HT at all, but designed for music reproduction - you trim the fat (high xmax, expensive baskets, metal cones) and can keep a modest efficiency. With even a 4" coil, I wouldn't want to run more than 500W - and that is a relatively inexpensive target power level these days.

Keep in mind that what I'm talking about is the ability to have chest-thumping kick-drums, outdoors, at a listening distance of 10 meters. If you expect to be indoors, and at closer distances, you might be able to relieve some of the sub-duty. But I still think PA equipment will be an easier solution (whether you buy them for the long run - or rent them on occasion).

Listen to some audiophiles talk about how loud 100dB is and tell me it's not "weak bass"

I thought audiophiles got enough bass out of a 4" full range driver?

Honestly, we dragged a couple of them outdoors and set them up with little Horn+12" two-way and they didn't really have the output. Sure - they were better than nothing, and better than some of the other woofers we had laying around in boxes. But I wouldn't use less than 6 18's and 3kW for the music type you list with a good set of PA monitors.

And the fact that most drivers you purchase dont have the exact specs a manufacturer listed -> audio just becomes an impossible leap of faith...

There is no general rule as to what will meter louder with everything up in the air. If you just put it in there with little placement tuning - it could go either way. But if you fool around with placement and tuning you could get 2 results *depending on how you tune* If you tune by ear (generally in the seat) or with mic at headrest - you'll get louder at the headrest. If you tune with a mic at the dash - you'll obviously get louder at the dash. edit: what this tells us is that typical systems that can afford placement and tuning (unlike my roomates single-cab S10, his 15 doesn't have many options for placement) can generally hit higher at the headrest because people tune them by ear. I would also guess they'd peak lower in frequency because we all know how low notes make us feel

You should try contacting Audioque first, I know the website lists some info on an HD3 18 - but its also not available to order on the website. Im sure they'll know best about if/when it will be available for purchase or recone.

4-5 cubes each tuned to 30Hz.

I'd love one, or eight. Keep the performance close to 2 MJ18 at a price point below 2 18's. Something that'd work with 6 cubes tuned to 30-35Hz. But I wont be buying any soon.

What they achieve for a wind tunnel - at the expense of flow rate due to drag - is a uniform, perpendicular flow of air. Literally "straightening" the air/wind out so it doesn't create turbulence of its own. For ports, using a lot of little tubes is just going to increase port surface area and reduce the effective area at high velocities(leading to port compresion). So, no. I don't think i'd try using it.

Yeah we can, but my dream is a little more forgiving on the electrical system. I'd rather do 12 Mj-18's from Mach5 in a cut-through or van. Hell, better make that 16

I wouldn't go with a clamshell/pacman/diamond box like we're seeing the big street beaters bring back. These are really good ways to stick a lot of woofers into a truck/van while building a wall. And what's with the "port on top, subs under that"? I would build it just like you had it.

I decided to insult you because I was trying to explain that you shouldn't fear driver parameters and call my explanation "mumbo jumbo" as though I'm TRYING to just confuse others with my fancy-pants words.

"Gimmie that" looks to hit around 41Hz on the low-end with some other notes. But "Air forces" seems to have more general noise/information - perhaps that's what makes G.T. sound louder. "Bangin screw" looks kinda funny, not too constant with a large dual peak at 44+87Hz together. Try to use "Im throwed" Paul Wall - has a VERY constant peak (like Trap or Die - Y. Jeezy) at 47Hz. Maybe the higher note could help.

Is the paul wall song off the new one? I still gotta get that CD - everyone says it hits pretty solid.

Its a technique used to build a wall where the drivers/port you use wouldn't fit on a flat wall. All you're doing is angling the baffle to create a larger surface area to place drivers/port on. Hopefully that makes sense .

Have you metered before? Do you know your peak frequency? A good idea might be Young Jeezy - "Air Forces" or "Trap or Die" they hit constantly at 42Hz for well over 30seconds a few times. edit: The rules clearly state: "...(Remember, you can only use music CD’s while competing. In addition, all doors, windows, and other openings to the vehicle must be closed.)..." - in the "Qualifying" section of the Bass Race rules.

He was referring to me, and I assume ca.com is Caraudio.com? Which I have never been a member of, so I couldn't stay there. And I will say I'm sorry if people take some of my posts too brashly, but I have a short fuse for people who ignore the fundamentals of loudspeakers. There is nothing mysterious about them, only the voodoo individuals attach to them. I tried to answer the question without using blind faith ("yeah the specs are just right") and assumed too much. My bad.

Smurf please. Just because ignorant people dont like my responses doesn't mean they're wrong. You would like some math then, huh? Well here ya go: 1 / 2*pi*sqrt(Mms*Cms) , with Mms in kg and Cms in m/N

Its not pucking mumbo jumbo, if you cant cope with math and physics that's not my problem.

Why would that be weird? It a function of the moving mass and stiffness/compliance of the suspension. Both of these are obviously different as they have different cones, surrounds, and spiders.

Yup.