CSS SDX-15's in action (excursion video's)

[Looneybomber]

Well these are my subs (Creative Sound Solutions SDX-15) hooked up to a Crown CE4000. Each sub is wired for 4 ohms so the amp only puts out about 1kw/chan at 4ohms. My clip lights never came on so I sent them less than 1kw, but it was close. As you can see these subs can handle more.

http://www.youtube.com/watch?v=ODm5G4nA ... zMJS5iOD5I <-- kinda crappy vidhttp://www.youtube.com/watch?v=gz3s4jKqtTw <-- Much better vid

Buy one for your car, you will not be disappointed.

[the converted]

sweet, now get them in a box!

[Looneybomber]

sweet, now get them in a box!

Still in the works. I can't settle on one design. I may have to build multiple enclosures, test them and see which one I like best.

[xekushnr]

Dang, those things move.

[the converted]

Still in the works. I can't settle on one design. I may have to build multiple enclosures, test them and see which one I like best.

whatcha thinkin bout?

[Looneybomber]

Dang, those things move.

And the key is linearity. It's rocking and rolling, but still within a linear motion, which means low distortion. It'll move 60mm (2.36") peak to peak within a 70% BL (motor force) and 80mm (3.15") at it's excursion limits. That's right around the same as what the JL 13W7 does...but at 1/3 the price.

whatcha thinkin bout?

#1 Large ported. 11.5ft^3 tuned to 15hz. But that brings more problems. - A. 6" round port could have chuffing issues at high outputs at <20hz. - B. Large slot ports eliminate chuffing, but now bring about 1st harmonic resonances that could be problematic - C. How to move a 2ft x 2ft x 4ft enclosure that weighs over 200lbs? - D. How to fit a giant enclosure in your room so that it looks nice? - E. How to finish a giant enclosure so that it's not too expensive but still looks nice. Some Veneers could cost over 400.00 to finish just one enclosure. Piano black will cost quite a bit AND take a LOT of work!

#2 Medium sealed. 4.5ft^3. - A. I lose a lot of output from 11-45hz in comparison to the large ported enclosure.

As a reminder, these are for my house, not my car! They work well for either though as you can see from my video.
Modified by Looneybomber at 11:40 AM 4/12/2008

[the converted]

As a reminder, these are for my house, not my car! They work well for either though as you can see from my video.

[/QUOTE]

Ahhh, that explains the crown amp. How loud is this really going to be? I've got a 8" velodyne sub that has all I need for low end.

[Looneybomber]

Ahhh, that explains the crown amp. How loud is this really going to be? I've got a 8" velodyne sub that has all I need for low end.

Ah yes, my Crown CE4k. It's tested to 981w/chan (both chan's tested) at 20hz (with a sinewave not burst test) with 1%THD+N.http://home.pacbell.net/lordpk/bink/bink.jpg

Ported? It'll depend on room gain. I'm going to sit about 4yds away from them...so I should easily have 110-114db from 15hz+. In the middle of my room, between the two subs where you could dance/rock out...116-122db

Sealed? Drop the 12-30hz by about 5-8db depending on the frequency. 31-45hz will be down only a few db. Below 12hz I'm not too worried about.

Another thing though is my mains are pretty beefy. Currently they're a pair of Cerwin Vega LS-12's, but I'm going to replace them with some Lambda MTM's. They use dual 10" drivers as the mid/mid-bass and a high efficiency 6" ribbon tweeter capable of 120db output (at 1M) with a normal receiver. (John J. from http://www.aespeakers.com specs them to do 130db peaks with a heafty amp)
Modified by Looneybomber at 12:17 PM 4/12/2008