ported box calculations

hey guys like the title said i need help asap. im trying to build a ported box by thursday. i know how to build a box i've built a couple the problem is that i built all sealed and now i have to build a ported one for some one and its been so long i forgot how to do the calculations, i learned how to do it by hand and i dont know how to do the whole calculator thing ive tried  and got more confused below is all the info i have on the subs and i can't figure out the min. port dia, how long port has to be one said 245 inches...wow cant figure any of  this out..just lost can u please help one last thing what does ported COMPACT  1.5@35 OPTIMAL  2.0@33HZ

TRUNK SPACE

42" WIDE, 15" HEIGHT,ROUGHLY 10 OVER THE HUMP ... BOX IS GONNA BE SHAPED LIKE THIS CAUSE OF HUMP

re audio sx 12"

12"

Mounting Depth - 6.9"

Mounting Hole Diameter - 11.2"

Overall Diameter - 12.5"

Bolt Hole Circle - 11.75"

Motor Width - 7.3"

Motor Depth - 3.44"

Basket Depth - 3.46"

Displacement - 0.16 cu. ft.

Weight - 24.5 lbs.

Electrical Q Value -Qes: 0.32

Mechanical Q Value -Qms: 4.4Total Speaker Q Value -Qts: 0.30Free Air Resonance -Fs: 30.6 HzEquivalent Compliance -Vas: 47.6 litersOne-Way, Linear Excursion -Xmax: 22 mmEfficiency -SPL 1W/1m: 88.1 dB SPLEffective Piston Area -Sd: 480 cm^2DC Resistance -Re: 1.9 ohmNominal Impedance -Znom: Dual 2/4 ohmThermal Power Handling -Pe: 1000 WForce Factor -Bl: 21

ported 1.5@35Hz  2.0@33Hz

the title before i posted it said i need help with a box asap

Using sentences makes a post much easier to read.  Please read the forum rules and write in regular sentences.  What is it you're trying to calculate, the internal volume of your proposed enclosure?Support the12volt.com

DYohn wrote: Using sentences makes a post much easier to read.  Please read the forum rules and write in regular sentences.  What is it you're trying to calculate, the internal volume of your proposed enclosure?

Really? I think its pretty clear hes trying to figure out the port dimensions.  Sorry that some of us are uneducated (like myself)

There is a slot port and a round port calculator on this site. You can use those instead of doing the calculations by hand. You could also download WinISD for free and use that. The compact enclosure size is going to be the smallest enclosure that RE would recommend. The optimum is what they believe is going to be best for that sub.

Go to RE audio's website... There is a box building page specifically for their subwoofers.Be original yet acceptable.

madspeed wrote: DYohn wrote: Using sentences makes a post much easier to read.  Please read the forum rules and write in regular sentences.  What is it you're trying to calculate, the internal volume of your proposed enclosure? Really? I think its pretty clear hes trying to figure out the port dimensions.  Sorry that some of us are uneducated (like myself)

Really.  You should probably read the forum rules too.

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