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<blockquote data-quote="ilikeradios" data-source="post: 8552358" data-attributes="member: 635997"><p>I am getting a box built for my truck.</p><p></p><p>It is in a Crew Cab and will be replacing the rear seat.</p><p></p><p>Right now I am running a set of 12" Skar VVX version 1's</p><p></p><p>I will most likely be upgrading to a pair of Ultra's in the near future.</p><p></p><p>What I wonder is if 2.25 per driver is too large?</p><p></p><p>I am running a ton of power to them via a RP 2000.1</p><p></p><p>Would going smaller help with power handling?</p><p></p><p>Basically will the Ultra's do good in a 2.25 sq / each tuned to 30?</p><p></p><p>Would you change anything?</p><p></p><p>From the builder...</p><p></p><p>Using your dimensions of 14"H x 48"W x 18"D we are at 5.29^3ft gross vol. Slot port, 12.5"H x 3"W tuned to 30Hz. After all displacement, 4.51^3ft net vol. Driver hole cut to 11.250”. Built from 3/4" High Quality, Five Ply North American Birch; A very Stable and Strong panel that is Tough, Durable, and Light Weight, and has been shown to perform very well acoustically! A 1.5" thick reinforced baffle board and fully braced &amp; supported where needed. Deflection boards in all the vertical corners to kill standing sound waves, this reduces distortion and adds strength to the enclosure, deflector boards are made from .75” birch strips and fastened with ribbed fasteners. The port panel ends and corners are rounded to eliminate port noise. Seams are cut matched and panels interlocked for added strength. Seams fastened with TiteBond heavy duty construction adhesive. Seams are first clamped then fastened with 2" countersunk drywall screws.</p></blockquote><p></p>
[QUOTE="ilikeradios, post: 8552358, member: 635997"] I am getting a box built for my truck. It is in a Crew Cab and will be replacing the rear seat. Right now I am running a set of 12" Skar VVX version 1's I will most likely be upgrading to a pair of Ultra's in the near future. What I wonder is if 2.25 per driver is too large? I am running a ton of power to them via a RP 2000.1 Would going smaller help with power handling? Basically will the Ultra's do good in a 2.25 sq / each tuned to 30? Would you change anything? From the builder... Using your dimensions of 14"H x 48"W x 18"D we are at 5.29^3ft gross vol. Slot port, 12.5"H x 3"W tuned to 30Hz. After all displacement, 4.51^3ft net vol. Driver hole cut to 11.250”. Built from 3/4" High Quality, Five Ply North American Birch; A very Stable and Strong panel that is Tough, Durable, and Light Weight, and has been shown to perform very well acoustically! A 1.5" thick reinforced baffle board and fully braced & supported where needed. Deflection boards in all the vertical corners to kill standing sound waves, this reduces distortion and adds strength to the enclosure, deflector boards are made from .75” birch strips and fastened with ribbed fasteners. The port panel ends and corners are rounded to eliminate port noise. Seams are cut matched and panels interlocked for added strength. Seams fastened with TiteBond heavy duty construction adhesive. Seams are first clamped then fastened with 2" countersunk drywall screws. [/QUOTE]
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