Question about Rockford Fosgate Punch 500S Car Audio Amplifier

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I have a rockford 500s i need a size for a sealed box for a crossfire bmf w12d. i am putting it in the hatch of a 96 camaro so preferably the smallest one. i cant go on crossfires website i only have my phone for internet so i dont have flash. thanks

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If it is a single 12" the rule seems to be 1 cubic foot of airspace. Fill a smaller box with fiberfill
and it thinks it's bigger.
If you want to compensate for the volume taken up by the woofer, you can use the following approximations. Keep in mind that these are for 'normal' woofers. If you're using a competition woofer with a huge frame and magnet structure, refer to the manufacturer for the actual displacement volume of the woofer. Even if you're not using competition woofers, most high quality manufacturers provide this spec in the woofer's datasheet. 8 inch .03 ft3 10 inch .05 ft3 12 inch .07 ft3 15 inch .10 ft3 Also noting that a box that is 12" X 12"X18" should get you in the 1 cu ft range but you may need
to go 14X14X14 or 1.3 cu ft to be able to get the speaker into the box-clearance!
Dont use plywood! It flexes. Use MDF and use a silicone sealer like window or door seal
to make it air-tight. To get more audio out of a small amp, add a port however the calculation
of port size is a bit scarse.
Here is the site I use. Maybe you can write down the www and go view it on someone's computer.
See # 110 on the right side pane. I love this site for all calculations.

Posted on Mar 11, 2011


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Box recomendations

It depends on the size of the subs- 8z 10z 12z 15z? whether or not you port the box is up to you- a ported box is generally louder than a sealed box -as you are coupling and tuning the sound from the rear of the driver with the sound generated from the front of the sub- but the box is also generally larger as well.Then aside from your preference of ported/sealed you have to account for the recommendations of the manufacturer as to whether the sub/speakers are meant to be placed in a ported or sealed enclosure. Most 10 inch subs do well in a box that yields .75 cubic feet to1.0 cubic feet.most 12z do well in 1.0 cu feet to 1.5 subic feet and 15z do well in 1.5 to 2.5 cubic feet. I have a set of 15z that require 4.25 cubic feet per sub-so its important to look into the manufacturers recommendations. The easiest box to make would be a sealed enclosure-and the sound quality generally yields a tighter more accurate bass sound along with increased power handling capability- try going to rockford fosgate .com and look into the woofer box wizard its a program that calculates air space for whatever size box you have room for-hope that helps you-good luck

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