port length

[GemaRastem 10+ year member]

when I use this calculator http://www.carstereo.com/help/Articles.cfm?id=31 and I want 2 ports, and it outputs 19 inches, does that mean both need to be 19 inches, or they both need to be 8.5"?

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[kuijo 10+ year member]

they probably both need to be 19 inches, but i have no idea what the dimensions are, to doublecheck on a diffrent site.

http://www.maximacar.com/

i like that one better.