Hey Guys, I want to start box building but I have one question I can't seem to find the answer to. In the picture attached to my post, which one is port Area, A or B? Or are they supposed to be the same? Thanks! JBam
So in the above picture, the port turns, meaning I want to make A equal to B?
This particular enclosure (rendered below) is for a friend of a friend who wants to pay me to make it. He wants two 15" Kicker Comp VX's in a ported enclosure. I told him that he doesn't need two 15's but he insists. So here I am. Thanks for the help!
Right, so the port area is denoted by the AREA of A, and should be constant throughout the length of the port, meaning if the port were to extend long enough to require a TURN, then B should be = to A. The problem with the sketch in your first picture is that the "end" of the port is too close to the back wall. Typically you want to stay away from ports the end like that, you either want to leave a space equal to about 1.5 - 2 times the WIDTH of the port. Or you want to extend the port to make an actual turn by putting an L shaped port turn.
Ill draw some pictures later tonight to better illustrate what I mean.
As far as that second picture goes, those ports seem rather thin. I would personally go with a thicker port, but that can work if you don't mind some port noise.
So, this is what I gather from your response, Alonzoub. That makes alot more sense.
And Joe, is there a reason why you chose 3 cubic feet? I know their site says 3-5. Is smaller more responsive? Or will it just save me on the cost of supplies?
Not at all J-Bam as you see it, now has an external volume of almost 9.6 cubic feet, a monster already, imagine if I choose a Vb of 5 cubic feet per sub!! You would need four people to put it in if it fits at all.
If the dims I used do not fit I can always change them.,
The length of the port can be apprixmated by measuring the length of the dotted line in the picture below. Notice how if you use the box wall as a port wall, it extend the "length" of your port by about half of the width of the port. You also want to take that into account as part of your port volume.
So the Yellow volume you see below belongs to the port, everything left inside the cavity will be your box volume (minus bracing and subwoofer displacement).
