box build please confirm this all makes sence.

[splescort 10+ year member]

for HDC3 15 sub.

42.5 wide

16.75 tall

15.75 deep

sub facing up and TWO slot ports firing up

ports both 2.75 wide

and both 31" long

and both 14" tall

should get me round 36hz mark sub displacement is .6cuft i think.

I have never done a dual slot port with only one chamber.

please let me know what you guys think

I am going for a street pounder with the ability to go to a comp or few.

Click to read more...

 

[jeremyg1 10+ year member]

are the ports internal or external?

I do not have a lot of experience with this subwoofer but 170 sq inches of port seems a bit on the high side. Port displacement alone is going to be around 2 cubic feet.

 

[RangerDangerV2 5,000+ posts]

just do one big port if this is your first box... it will be much easier for you.