Quentin Jarrell

I agree, my Mids are crossed down to 55 hertz, I also like my subs in a .7 qtc ported enclosure with a f3 around 25-27 hertz but some woofers are just not designed for that.

tuning 34 hertz or lower will result in a saddle shaped responce curve from 40 to 100 hertz with a 1.25 db loss and no gain. Tuning to 40 herts will give a pretty flat responce down to 60 hertz with a nice little boost from 60 to 38 hertz. Because he wanted to save space I would go with a higher tuning. If space was not an issue a larger enclosure could easily compensate for the losses of a lower tuning.

I have worked up three different options for you. 1. sealed, my least favorite and personally would not do sealed for this sub. qtc .7 (flattest responce with most bass extension) .32 cubic feet with a f3 (3 db loss) @ 67 hertz. Using a larger sealed enclosure just results in a loss responce from above enclosure. 2. best sq ported enclosure with qtc of .7 (flatttest responce with most bass extension) .56 cubic feet tuned to 38.5 hertz with a f3 (3 db loss) @ 38.5 herts 3. typical daily ported enclosure 1.25 cubic feet tuned to 40 hertz with a f3 (3 db loss) @ 35 hertz and a 2 db gain @ 45 hertz As long as you don't want 45 degree corners (which you'll never hear the difference anyway with enough port area) eigther ported box will be 115 plus shipping and the sealed box will be 90 plus shipping.

He needs a gusset on that plate. And I would turn the voltage up on my mig welder to get better penetration. The bead should be concave not convex like in the photo.

I would go with the larger of the two 3.2 cubes @ 30 -6db @30 hz -3db @38 hz -1db @62 hz port 37.47" long 4 cubes @ 30 -6db@ 27.75 hz -3db @ 32 hz -1db @ 65 hz port 43.8" long neigther boxes have peaks just gentle roll offs.

I'll be posting a 6th order 15 enclosure I'm working on in a few days

Forgot to mention this is a 10 inch driver

500 non clamped (calculated using sub impedance and amp voltage with 50 hertz test tone) with Hifonics Brutus amp song played is Mr. Magic "I Smoke, I drink"

I would care about theft, I have insurance for that. It would like to have it for my old lady. It would give her a little more time to get the .40 out of the center console. I would be concerned if their was an accident. It may affect how a first responder might get her out of the vehicle.

Don't cut out you normal routine completely. Bc you will get burned out. Just limit your fast-food and softdrink input. Look at bodybuilding. Com. They have a lot of helpful advice and small programs for people getting started.

My distributor will not drop ship to you. So shipping would have to be paid twice. I would only be able to give it to you for a few dollars cheaper than other online prices. It would probally be better for you to buy online with someone who stocks the piece just in case something is defective on the kit or other problems occur, so you will becable to get a new piece quicker.

I wonder if he's using a ton of pioneer still or if he has downsized to something like Allan Dante ?

The divine will be just that. 33mm xmax at 70% bl. With 36 bl and a motor force factor of 370 bl^2/re. It's one of the strongest motors on the market. We will be using a 4" coil former with an aluminum cone to help with cooling.

They have tons of stuff that they carry. The pic I posted at the beginning of the thread shows all the manufacturer's they carry

I ll get it for you tomorrow. I though maybe you were going a different route going by your other post

I'll have something sweeter for you to look at in about a month If you are looking for daily groundpounding output. However they won't be strictly "spl" because there isn't a large enough market.

Xbl does not make louder subs on less power it makes them as loud on less power. Again let's go back to the brahma, or the Tempest since most people remember them. They were just as loud as their competition's comparable subs in the day but they are known for using much less power. These subs aren't magical. They simply utilize their magnet force over more of their stroke than other topologies. A 20mm xmax, 15 bl overhung sub with the exact softparts will be as loud as a 20mm xmax 15 bl xbl sub. The xbl sub will just use less power to get there. Anyhow we frequent some if the shows and comps this fall to show what we have.

Ask scottie about the extremes

He didnt say the high xmax of his subwoofer would make it louder than normal, he was using that as a reference or example. The fact the sub utilizes Xbl^2 technology is what makes it louder on lower power compared to a driver of the similar make-up without the Xbl^2 technology. Since I have a BL curve of our Divine motor we will use it as an example. This sub has a one way xmax of about 33mm one way. The topology (on this particular motor) allows the BL (motor force) to keep nearly 95% of it's strength through 70% of its linear stroke. Typical overhung motors start to lose motor force rapidly as the coils moves away from the center of the gap. So in order to keep the force on the coil constant you have to compensate for that loss in BL (motor force) by increasing amplifier power. If this this doesn't explain it better let me know and I can upload white papers from Dan that might explain it a little easier.

Nope, absolutly NO more power. This is the whole point of us using Xbl^2 technology. How many other 25 mm xmax subs on the market only need 500 watts? Not many. We can get just as loud with 40-60 percent less power than any standard topology in the market. There for saving you the customer $$$$$$$ in the long run. Imagine running two of these 15's on 1,000 watts and being just as loud as you buddy. But your buddy needed 2,000-2,500 watts so he spent twice as much on his amp, twice as much on his wiring, had to buy more batteries, and more than likely had to buy a high output alt. The best example that people can relate to would be Dan's Brahma. Shit tons of output, but only needed 1,000-1,200 watts. How many subs on the market today with equivilant output only uses 1,200 watts?

apprx 450 watts clamped playing sound sweep

on music playing lil boosie

I would say we are using ferro-fluid, but we're not. The spiders I received were not correct so I "rigged" one for this 10" and a 15" to do load tests on the motor and coil. It doesnt look too pretty so I didn't take any pics of it.

I'll get a price tomorrow