Sa-12 box

[Prestondrew40]

I just ordered two sa-12 d4 and I want to start on the box so when they get here I can throw them in. I’m going to order a taramps md3k for them. Space available is 33w 23d 23h. I got a cut sheet from a buddy of mine, just wondering if someone could look over it and make sure it’s good. Also can someone change it to a center port?

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[THATpurpleKUSH 5,000+ posts]

You have to make the box oversized and tuned lower by a small amount to compensate for the lack of ability to figure in sub displacement or else volume and tuning will be off when you install the subs. The RE box calc isn't really for beginners because you have to check the final numbers in other programs and know what you are doing.

And no you can't make it do a center port.

 

[shredder2]

I think on your planned power that 80in2 of port is a bit excessive, I'd try for 65in2 or so in that volume personally.
Out of curiosity, what vehicle is this going in?

 

[Prestondrew40]

You have to make the box oversized and tuned lower by a small amount to compensate for the lack of ability to figure in sub displacement or else volume and tuning will be off when you install the subs. The RE box calc isn't really for beginners because you have to check the final numbers in other programs and know what you are doing.

And no you can't make it do a center port.

What would you recommend then? I’ve tried playing around with other box calc but they don’t really work to good

 

[Prestondrew40]

I think on your planned power that 80in2 of port is a bit excessive, I'd try for 65in2 or so in that volume personally.
Out of curiosity, what vehicle is this going in?

Toyota Tacoma. I’m removing the double seat and mounting it to the floor

 

[THATpurpleKUSH 5,000+ posts]

If its going in a truck you should fire the port to the side. Subs up port to the passenger side with a 8inch aeroport.

 

[Prestondrew40]

If its going in a truck you should fire the port to the side. Subs up port to the passenger side with a 8inch aeroport.

I don’t know much ab aeroports. I want something thats gonna get deep and not just be super airy if that makes sense. That’s why I was leaning more towards vented port.

 

[shredder2]

If its going in a truck you should fire the port to the side. Subs up port to the passenger side with a 8inch aeroport.

This ^^^^ %
An 8" aero would be perfect

 

[THATpurpleKUSH 5,000+ posts]

I don’t know much ab aeroports. I want something thats gonna get deep and not just be super airy if that makes sense. That’s why I was leaning more towards vented port.

If you dont know much then listen to what the veterans on here are telling you.

Aeroports are more efficient and flow better and dont need as much port area. They are much easier to design and work with than a slot port

 

[Prestondrew40]

If you dont know much then listen to what the veterans on here are telling you.

Aeroports are more efficient and flow better and dont need as much port area. They are much easier to design and work with than a slot port

So what would you recommend box size and where to get the port from?

 

[THATpurpleKUSH 5,000+ posts]

So what would you recommend box size and where to get the port from?

Just google big ass ports 8 inch, you can buy them directly from big ass ports, amazon, ebay etc. You need a port thats about 22-23in long to tune around 34hz and 4-4.2cf like your original plans.

 

[Prestondrew40]

Just google big ass ports 8 inch, you can buy them directly from big ass ports, amazon, ebay etc. You need a port thats about 22-23in long to tune around 34hz and 4-4.2cf like your original plans.

Okay. Just to make sure, you’re saying put box on the driver side, and have subs up with the port towards the passenger side?

 

[Oldmang]

Okay. Just to make sure, you’re saying put box on the driver side, and have subs up with the port towards the passenger side?

Subs up/side fire port with some clearance on the passenger side.

 

[THATpurpleKUSH 5,000+ posts]

Okay. Just to make sure, you’re saying put box on the driver side, and have subs up with the port towards the passenger side?

Yes and at the minimim there needs to be space no less than half the width of the port between the opening of the port and the surface it fires towards. You need enough room for it to breath and vent the air flow.

 

[Prestondrew40]

Yes and at the minimim there needs to be space no less than half the width of the port between the opening of the port and the surface it fires towards. You need enough room for it to breath and vent the air flow.

Okay thanks! Sorry for so many questions, but you think the box parameters on that cut sheet would work good? And what ab sub position? Wouldn’t the port run into the subs?