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<blockquote data-quote="Bama Shadow" data-source="post: 7217177" data-attributes="member: 573603">I am going to build a new box for 2 Polk SR104&#039;s and tho I have built boxes before, I never designed one so I thought I&#039;d ask here first.Sub specs areFs =&nbsp; 35 HzQms =&nbsp; 9Vas =&nbsp; 0.777 cu.ftXmax =&nbsp; 0.64 inSd =&nbsp; 53.69 sq.inQes =&nbsp; 0.5Re =&nbsp; 3.5 ohmsZ =&nbsp; 4 ohmsPe =&nbsp; 700 wattsBox I have in mind is 37Lx11Hx16D for 2.83c/ft before displacement.After displacement I got 2.16c/ft. .12 for each sub, .46 for the port if I calculated correct.Port is 2.5&quot;W x 9.5&quot;H x 24&quot;L made from 3/4 MDFWhich WinISD says puts the tuning at 32.68Does this all sound reasonable ? I would welcome suggestions, or if any of yall want to run the #&#039;s feel free. Box is going in an 07 Mustang behind the back seat, subs and port facing foward. The hole there is 11.5x38&quot; give or take. Subs will be powered by a MBQuart DSC2000.1 @ 2 ohms for 1000 watts RMS.</blockquote>

[QUOTE="Bama Shadow, post: 7217177, member: 573603"] I am going to build a new box for 2 Polk SR104's and tho I have built boxes before, I never designed one so I thought I'd ask here first. Sub specs are Fs = 35 Hz Qms = 9 Vas = 0.777 cu.ft Xmax = 0.64 in Sd = 53.69 sq.in Qes = 0.5 Re = 3.5 ohms Z = 4 ohms Pe = 700 watts Box I have in mind is 37Lx11Hx16D for 2.83c/ft before displacement. After displacement I got 2.16c/ft. .12 for each sub, .46 for the port if I calculated correct. Port is 2.5"W x 9.5"H x 24"L made from 3/4 MDF Which WinISD says puts the tuning at 32.68 Does this all sound reasonable ? I would welcome suggestions, or if any of yall want to run the #'s feel free. Box is going in an 07 Mustang behind the back seat, subs and port facing foward. The hole there is 11.5x38" give or take. Subs will be powered by a MBQuart DSC2000.1 @ 2 ohms for 1000 watts RMS. [/QUOTE]

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