two 4" or one 6" Port for 2 x12

[soloxp]

I'm building a box for my 2 Sundown x12 D4 ohm 15h x 36w x 25d =6.33cuft after sub & 2 4" ports, it will be some where around 5.85 cuft maybe a little smaller. I can fit a 6" port with out flare ends. What do you guys think, two 4" with flare ends or one 6" with out flare.

I'm going for 28hz. Should have the subs in today. Still waiting on the BC3500D from Crescendo.

Thanks.

[arcwcb]

Two 4" aeros gets my vote

[arcwcb]

Although, neither of those options is even close to giving you enough port area

[49konvict]

Yeah more like two 6 inch ports. Those x12s can displace some serious air.

[arcwcb]

Yeah, two 6" ports put it at 9.66 sq in per net cube ft. That would work well.

[49konvict]

Port area is a direct relation between cone area and air displacement.say two t welves with 20 mm xmax need a single 6 inch port than two t welves with 40mm xmax will displace twice the amount of air than it will need roughly twice the port area. Now there are exceptions but this is a god starting point.

[soloxp]

If I do a slot port will I still have enough room for the 2 12. I would have to use RE box calculator cause I not good with slot ported box.

If someone don't mine helping me do a slot port box...then i'll do that.

[soloxp]

This dose not look right. Can some give me a helping hand. I'm not asking you to do it for me. The cut sheet is way off from this box.

http://s655.photobucket.com/user/sol...box-1.png.html

http://s655.photobucket.com/user/sol...hzbox.jpg.html

http://s655.photobucket.com/user/sol...zport.jpg.html

[arcwcb]

What is it you are asking us to do? The calculated tuning is off, that is the only thing I see without running numbers off the 3D model. You only have 28.75" of port length. What else are you asking?

[arcwcb]

Here are the pics so we don't have to click back and forth.

[soloxp]

Will this be good enough air for this box...5.85 cu.ft 8" port tune to 29hz.

29hz.jpg Photo by soloxp | Photobucket

[arcwcb]

You should be ok with that

[soloxp]

Thanks for reply.

[arcwcb]

Make sure you post pics once you Build it!

[soloxp]

Will do. Quick question...will it make a difference if the port is in between the 2 sub's? Or right of the sub's like I have it now. I like the look of the port in between.

Thanks

[49konvict]

Port in the middle would be best. The subs load evenly with the port in the middle.

[soloxp]

Well, here the box...I was going to try to make the port flare but did have time. Also I ended up getting the SAZ-3500D over the Crescendo BC3500D cause it was going to be another 2 weeks to get the amp.

Also got this battery (Sears.com)... [email protected] they drop the price again need to go back and get's soom money back. This will be the sec time.

IMG_20140301_192936.jpg Photo by soloxp | Photobucket

IMG_20140309_221503.jpg Photo by soloxp | Photobucket

[666WMD]

Originally Posted by soloxp

Well, here the box...I was going to try to make the port flare but did have time. Also I ended up getting the SAZ-3500D over the Crescendo BC3500D cause it was going to be another 2 weeks to get the amp.

Also got this battery (Sears.com)... [email protected] they drop the price again need to go back and get's soom money back. This will be the sec time.

IMG_20140301_192936.jpg Photo by soloxp | Photobucket

IMG_20140309_221503.jpg Photo by soloxp | Photobucket

At the top of the message box is a little yellow tab that looks like a mountain and a moon. Click that to insert the PB Direct Link into it.

[soloxp]

Thanks 666WMD...

Well got the sub's and amp in... [email protected] these sub's get low and loud. I'll try and get a video up this weekend. Thank you guy's for the pointer's. Still need to put the battery in. My 5 yrs old redtop is holding up ok

[southerntrendkill]

Nice man. Hope your happy with your sundowns as i know i am! they are built like f u c k i n g tanks!

[soloxp]

Here is the video....

It's my first video ever on YouTube, camera not so good. Have to do some clean up work. And still have to put the back set in and hook up the battery.

2 Sundown X 12 - YouTube

[southerntrendkill]

Yes sir just as suspected them sundowns are brutal. Bet ot sounds hella good on tje cab. Good work representi.g the §UNDOWN§

[Notorious97200]

Why such a low tuning ? you'll loose output on most bass notes.
I'd rather tune my boxes to 32 Hz. It still gives me plenty lows, and everything else. I must say that I don't listen to slowed tracks regularly. some decaf from time to time. so 32 Hz is nice enough for me.
Good choice on sub and on port. 2 4" port have less surface than 1 6" : so you made the best choice, but I'm sure it's still not enough overall, but Enough to please you !!!

[soloxp]

Originally Posted by Notorious97200

Why such a low tuning ? you'll loose output on most bass notes.
I'd rather tune my boxes to 32 Hz. It still gives me plenty lows, and everything else. I must say that I don't listen to slowed tracks regularly. some decaf from time to time. so 32 Hz is nice enough for me.
Good choice on sub and on port. 2 4" port have less surface than 1 6" : so you made the best choice, but I'm sure it's still not enough overall, but Enough to please you !!!

I tune low cause I love the deeeeep bass, my TC-Sound 3000 (just got replace with the x 12s) that I had since 2006 was tune to 25hz, 27hz and 28hz. That sub play what ever I put on it. It was low and loud.

As for the sec part of the port...I didn't go with 2-4" or 1-6", I went with 1-8" port.