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help with 4th order for 16 12's
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<blockquote data-quote="irpirate" data-source="post: 7121122" data-attributes="member: 627086"><p>i have 16 infinity 1262w's d4's running off a saz 3500 @.5. i built a ported clamshell for it but it isn't performing like i hoped it would.</p><p></p><p><img src="http://sphotos.ak.fbcdn.net/hphotos-ak-snc4/hs1178.snc4/155017_1557240289177_1180320105_31307473_4951039_n.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>gonna be building a 4th order in january but wanna get the design verified. (note: initial design was done by 2000lade, i just tweaked with it). never designed or built a 4th order before.</p><p></p><p>outer dimensions are 59.5 depth. 33 height. 37.5 width</p><p></p><p>16 subs. 8 per sealed side.</p><p></p><p>qts - .46</p><p></p><p>Vas - 2.83 ft^3</p><p></p><p>Fs - 25</p><p></p><p>the sealed area will be 7.93871 per 8 subs. so Vr - 15.87742 cubic feet - sub displacement accounted for</p><p></p><p>ported area. Vf - 17.88276 cubic feet.</p><p></p><p>double baffled loading wall. single baffle will give me 18.4</p><p></p><p>i modeled it up on winisd. port is 19x19. tuned to 45.5. sub and port displacement accounted for.</p><p></p><p>45.5 hz tuning. all displacement accounted for.</p><p></p><p><img src="http://sphotos.ak.fbcdn.net/hphotos-ak-ash1/hs736.ash1/162899_1572636474072_1180320105_31334974_6663338_n.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p><img src="http://sphotos.ak.fbcdn.net/hphotos-ak-snc4/hs739.snc4/63913_1572636434071_1180320105_31334973_2171575_n.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p><img src="http://sphotos.ak.fbcdn.net/hphotos-ak-ash2/hs591.ash2/154298_1572636394070_1180320105_31334972_6585734_n.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p><img src="http://sphotos.ak.fbcdn.net/hphotos-ak-ash1/hs739.ash1/163178_1572636314068_1180320105_31334971_197851_n.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>note:2000lade suggested a 19.5x19.5 ported 3 inches long. said it would tune to 45. kinda confused on why he said that. hes the guy with 48 sa10's in his truck. he also said that 2:1 ported:sealed was what he would shoot for but i just don't have the space for that in my tiny *** 4runner. so its looking like 1:1.</p><p></p><p>thanks all!!</p></blockquote><p></p>
[QUOTE="irpirate, post: 7121122, member: 627086"] i have 16 infinity 1262w's d4's running off a saz 3500 @.5. i built a ported clamshell for it but it isn't performing like i hoped it would. [IMG]http://sphotos.ak.fbcdn.net/hphotos-ak-snc4/hs1178.snc4/155017_1557240289177_1180320105_31307473_4951039_n.jpg[/IMG] gonna be building a 4th order in january but wanna get the design verified. (note: initial design was done by 2000lade, i just tweaked with it). never designed or built a 4th order before. outer dimensions are 59.5 depth. 33 height. 37.5 width 16 subs. 8 per sealed side. qts - .46 Vas - 2.83 ft^3 Fs - 25 the sealed area will be 7.93871 per 8 subs. so Vr - 15.87742 cubic feet - sub displacement accounted for ported area. Vf - 17.88276 cubic feet. double baffled loading wall. single baffle will give me 18.4 i modeled it up on winisd. port is 19x19. tuned to 45.5. sub and port displacement accounted for. 45.5 hz tuning. all displacement accounted for. [IMG]http://sphotos.ak.fbcdn.net/hphotos-ak-ash1/hs736.ash1/162899_1572636474072_1180320105_31334974_6663338_n.jpg[/IMG] [IMG]http://sphotos.ak.fbcdn.net/hphotos-ak-snc4/hs739.snc4/63913_1572636434071_1180320105_31334973_2171575_n.jpg[/IMG] [IMG]http://sphotos.ak.fbcdn.net/hphotos-ak-ash2/hs591.ash2/154298_1572636394070_1180320105_31334972_6585734_n.jpg[/IMG] [IMG]http://sphotos.ak.fbcdn.net/hphotos-ak-ash1/hs739.ash1/163178_1572636314068_1180320105_31334971_197851_n.jpg[/IMG] note:2000lade suggested a 19.5x19.5 ported 3 inches long. said it would tune to 45. kinda confused on why he said that. hes the guy with 48 sa10's in his truck. he also said that 2:1 ported:sealed was what he would shoot for but i just don't have the space for that in my tiny *** 4runner. so its looking like 1:1. thanks all!! [/QUOTE]
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