View Full Version : port placement?

09-25-2012, 03:48 PM
alright so im going to put 3 3" flared ports in to a a dual 15 box with 4.88 cubes, its for my polk audio mm1540s and i was wondering where i should put the ports or if it mattered. Flared Port Tube 3" ID x 11" L with 5" Flared Ends 269-165 (http://www.parts-express.com/pe/showdetl.cfm?partnumber=269-165)
these are the ports

09-25-2012, 03:59 PM
Not enough port

09-25-2012, 04:09 PM
the box is going to be tuned to 30hz and winISD said that what i needed

09-25-2012, 04:55 PM
What kind of vehicle is it going in? That's not going to be enough port... It's better to do fewer, larger diameter ports too. A single 8" flare would do much better.

Follow the basic rule of thumb regardless of what WinISD says. 12-16 square inches of port per cubic foot of box volume.

09-25-2012, 05:12 PM
/its going in the trunk of my 02 accord. can i just pick up a huge piece of pvc? and use that? or do need to do more