Ported box for 2 SQ HDC3.112

[Papabiz]

What's up guys. I'm new to this site and never been on these before. But I'm needing some help. I currently have one SQ HDC3 12 IN A 3.7 cubic foot portend box at 33 hz. Powering it with a soundstream rub1.2500d at 1ohm. I am getting ready to buy one more sq hdc3 12 and want to build another box for it. I'm thinking maybe a 6-8 cubic foot ported box at 30-32 hz. I'm needing help coming up with the dimensions for the box and the port. I want to do a slot l port. I sucsefully built my other box a couple months back so I'm still pretty new at it but I have an idea of how to figure it out. Any suggestions at all would be helpful. Thank you in advance.

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[Jeffdachef 5,000+ posts]

is that gross or net?

 

[Papabiz]

Net. And I'd be using 3/4'' MDF

 

[Austin175 10+ year member]

Dimensions?

 

[Papabiz]

Well I got the dimensions for 7.1 cf. It would be Height-17''. Length- 35''. And Depth- 23''. Does that sound about right? Or do you guys think I should go bigger?

 

[LosIsATool 5,000+ posts]

At least 2 cubes per for 8 spoke subs.

 

[Papabiz]

And for a 8.2 net cf would be Height- 20". Length- 31". And Depth- 25".

 

[Papabiz]

And for a 8.2 net cf would be Height- 20". Length- 31". And Depth- 25".

 

[blazian87 10+ year member]

And for a 8.2 net cf would be Height- 20". Length- 31". And Depth- 25".

You wouldn't need it to be that big but you can if you want. I would definitely account for a double baffle if you have that much space.

 

[Jeffdachef 5,000+ posts]

8 cubic feet net is for two 15s man HOWEVER, your calculations are wrong

And for a 8.2 net cf would be Height- 20". Length- 31". And Depth- 25".

Thats only 7.42 cubic feet gross, not NET.

NET is after you subtract how much cubic feet the port, the sub and the bracing takes up.

 

[Papabiz]

Oh alright. Sorry about that like I said I'm new to making sub enclosures. So what would you guys suggest I make for it? I want more lows than highs. I was gonna get 2 sundown x12's but my girlfriend got me the HDC3.112 so I just decided to get one more and make another box.

 

[Papabiz]

Oh alright. Sorry about that like I said I'm new to making sub enclosures. So what would you suggest I make for it? I want more lows than highs. I was gonna get 2 sundown x12's but my girlfriend got me the HDC3.112 so I just decided to get one more and make another box