King_N9ne Posted November 8, 2013 Report Share Posted November 8, 2013 Anyone know? Can't find any specs, still. These and the Zv4's been out forever now and there still exclusive. Id appreciate the help 97 2dr GTP 140a AD244 DH platinum group 32 0awg welding cable SAZ-2500 / X-12 JVC Arsenal KD-A95BT Sony coaxials and factory tweets Link to comment Share on other sites More sharing options...
Joe X Posted November 8, 2013 Report Share Posted November 8, 2013 30mm (70% BL method). Link to comment Share on other sites More sharing options...
King_N9ne Posted November 9, 2013 Author Report Share Posted November 9, 2013 30mm (70% BL method). Not Xmech, displacement. 97 2dr GTP 140a AD244 DH platinum group 32 0awg welding cable SAZ-2500 / X-12 JVC Arsenal KD-A95BT Sony coaxials and factory tweets Link to comment Share on other sites More sharing options...
Joe X Posted November 9, 2013 Report Share Posted November 9, 2013 30mm (70% BL method). Not Xmech, displacement. That is Xmax not Xmech, to get displacement you multiply Sd (effective radiation area) by Xmax given above, if you own the sub you can estimate indirectly Sd measuring the effective diameter, displacement as such is never (to my knowledge) specified by manufacturers. If you are aiming to calculate port area the method above will be accurate enough, besides the use of Small's method for port area calculation is questionable as most people are not expected to hit Xmax at least for daily use, chances are you are going to end up with a bigger than necessary.enclosure. Link to comment Share on other sites More sharing options...
Joe X Posted November 9, 2013 Report Share Posted November 9, 2013 To be a little more helpful the Sd for the X-12 is unofficially 457 square centimeters and Xmax is 30 mm. You need to change the units of these two numbers to whatever units you want your displacement number on and then multiply them Vd (displacement) = Sd x Xmax. Link to comment Share on other sites More sharing options...
King_N9ne Posted November 9, 2013 Author Report Share Posted November 9, 2013 To be a little more helpful the Sd for the X-12 is unofficially 457 square centimeters and Xmax is 30 mm. You need to change the units of these two numbers to whatever units you want your displacement number on and then multiply them Vd (displacement) = Sd x Xmax. Wow, Im so confused lol... I didn't know xmax and sd is how you figure out displacement. I thought it was basically the volume that the cone, basket, magnet displaced in static form. Basically if you put the sub in a tub of water and measured what the sub displaces (w/o being completely submerged, the volume that only the box would see). I had no idea it was so complicated. So for example, a 12" type R has a .1ft^3 displacement. Roughly what would an X have? 97 2dr GTP 140a AD244 DH platinum group 32 0awg welding cable SAZ-2500 / X-12 JVC Arsenal KD-A95BT Sony coaxials and factory tweets Link to comment Share on other sites More sharing options...
MrEwubbsZ Posted November 9, 2013 Report Share Posted November 9, 2013 Anyone know? Can't find any specs, still. These and the Zv4's been out forever now and there still exclusive. Id appreciate the help For the x-12 it's .12cuft and the woofers needs 3cuft NET ported 2000 Ranger Build Log Link to comment Share on other sites More sharing options...
King_N9ne Posted November 9, 2013 Author Report Share Posted November 9, 2013 Anyone know? Can't find any specs, still. These and the Zv4's been out forever now and there still exclusive. Id appreciate the helpFor the x-12 it's .12cuft and the woofers needs 3cuft NET portedThanks. Sounds/looks about right lol. Yeah Im kind of on the fence for what's more important, volume or port area. Im feeding a D2 w/ a saz-2500 @ 1ohm. Im limited to a 5ft^3 gross box. Not sure how much port area per cube it needs, seems a lot of people suggest 18-22. I modeled a box @ 2.5ft^3 w/ 21in /ft^3 @ 30Hz. Not sure if I should sacrifice port for volume. Right now I got it in a 2.5 w/ 12 in/^3 labyrinth @ 32 and I like it, for now, but I know its suffocating. Chuffing like you wouldn't believe lol. 97 2dr GTP 140a AD244 DH platinum group 32 0awg welding cable SAZ-2500 / X-12 JVC Arsenal KD-A95BT Sony coaxials and factory tweets Link to comment Share on other sites More sharing options...
BobbyG2 Posted November 9, 2013 Report Share Posted November 9, 2013 I think he's looking for box displacement, not mechanical displacement. He's right, Sundown doesn't have it listed yet. *New vehicle and system coming soon.* Link to comment Share on other sites More sharing options...
Joe X Posted November 9, 2013 Report Share Posted November 9, 2013 Yes displacement and driver displacement are different things, they don't give any figures for box suggestions BUT they offer some cutsheets for people to consider (nothing nearly as large as 3 cubic feet of net airspace BTW). Link to comment Share on other sites More sharing options...
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