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Old 10-31-2016, 10:17 AM
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Default Need help with an easy box

Got a pair of DD 9512f D1's that ill be running on a pair of Rockford T1500-1bdCP's.

I have a 10" ID x 26" long aeroport, what would be a good box size for the 9512's on 1500rms each with this port to bring my tuning down to something reasonable? Shooting for 34hz.
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Old 10-31-2016, 11:15 AM
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5.5 cubic feet I believe
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Old 10-31-2016, 03:04 PM
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5.5cu ft seems too big for a pair of 12's
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Old 10-31-2016, 05:31 PM
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He asked to utilize that port and tuning. DD finds 2.75 cubes acceptable for a single 12
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Old 10-31-2016, 06:56 PM
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Ok cool.. thanks. Do u think that box will work well with that much port area?
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Old 11-01-2016, 02:26 PM
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Anyobe else? Is 79sq inches of port area to much for a pair of DD 9512's? Can this work well?

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SUBSTAGE: DD 9512f's on a CT Sounds 7k, 10" aero
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Old 11-01-2016, 02:41 PM
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Ive "heard" that DDs do well up to 20^2. I dont think that 79 is too much based on what ive seen and heard. No firsthand experience however

79 is only 14.3^2
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Old 11-01-2016, 03:49 PM
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Pay less attention to the port per cube, and look more at what the vent velocity will be with __ port dimensions. I like to stay between 24-28 m/s after I factor in the ssf/lpf. I did a box for 4 sa-12 that only had 13sqin port per cube, last week I did one for a custom 10" that had 23sqin per cube. The amount of Port per cube isn't even relevant to anything, the numbers don't matter, the vent velocity is what decides if you have issues. Too low and the subs perform like shit, and too high and you'll get port noise and the subs will still perform like shit.

Edit: I'd stay between 2.5-2.65cuft net per sub and they get loud.



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Old 11-01-2016, 08:39 PM
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Thanks.. wanna help with a box design? Lol
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