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Give me tips on my first box build? 4 SA-8's - CHEVY SILVERADO


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Whats up everyone, i'm new here and I'm really getting into car audio. Right now I have a 2004 Chevy Silverado that I threw 2 shallow P3 12's in. I really want something louder. I'm not quite ready to do a blow through, so I want my first build to be 4 Sundown SA-8's underneath the rear seat, facing the front. I want two 4" ports, one on each side.

I'm extremely new to box building, but I learn very fast. I have a few questions, and I would also really appreciate some pointers & tips.

Question #1: Since I want 4 subs with a port on each side of the box, am I going to need to put a center divider in the center of the box, so that I create two chambers, each with two subs and a 4" port?

Question #2: The SA-8's recommended box volume is .5-.75 cu. ft. so should I simply take .5 and times it by four, giving me a 2 cu. ft. box volume for the 4 subs?

That's all the questions I can think of...for now. Any tips or other help is GREATLY appreciated!!

Thanks,

Mike

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I can't really tell you much about dividing the chambers, but since the recommended colume is. 5-.75, it might be better to get around .6 cubic feet per sub, giving you a net volume somewhere around 2.4 to 2.5 cubes.

Edited by REVOofRustler

2002 Dodge Dakota 4.7 club cab - Sold 2004 Audi S4 Avant

- Fi and Crescendo - Stock Bose System

- http://www.stevemeadedesigns.com/board/topic/147725-2002-dodge-dakota-end-of-the-road/?hl=%202002%20%20dakota

136.4 Sealed @ 29hz

137.0 Drivers window open @ 26hz

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Separate chambers result in a bigger box specially if your net volume is low like in your case but not better performance, also you need to post the max dims for your box and the model of your amp for further suggestions, recommended RMS power 2-2.5 KW and electrical upgrades to support. If you want to design yourself there is a recently posted tutorial to do that.

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Right now I have a Rockfords Fosgate P1000.1bd so I'm hoping I can just throw another one of those in. Here is the dimensions of the box I have in there right now (I want it about the same size).

  • Cutout Diameter: 11"
  • Box Volume (Cubic Feet Per Chamber): 0.95
  • Mounting Depth: 5-3/4"
  • Box Type: Custom
  • Box Color: Black
  • Fit Location: Under Rear Seat
  • Box Finish: Texture
  • Dimensions: Width 51" x Front Height 9-3/4" x Rear Height 7-1/4" x Depth 13-1/2"
  • Material: MDF
  • MDF Thickness: 5/8"

  • I know some of that doesn't matter, but I just copied and pasted off ebay.

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Common chamber is a must for a flater response

2.4 net

2x 4" aero ports

23" long or 24" long if flared

32-33hz

Sav2 have a displacement of 0.1

You'll need to get 3.2-3.3cuft gross

Or if you want slot port

42sq" at 2.4net 32-33hz

And power them with at least 2500rms@ 12v

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Common chamber is a must for a flater response

2.4 net

2x 4" aero ports

23" long or 24" long if flared

32-33hz

Sav2 have a displacement of 0.1

You'll need to get 3.2-3.3cuft gross

Or if you want slot port

42sq" at 2.4net 32-33hz

And power them with at least 2500rms@ 12v

So i need to make my box about 3.2-3.3 cu. ft. and I should do a common chamber?

Also, is there a site I can buy the aeroports from?

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http://www.psp-inc.com/index.html

They also sell them on amazon

But they only come in 17"/18" flares

That ok

If you build separate boxes that better as separate amps are to be use,

Didnt see the other post as I was sending mine at same time

Build your box out of 3/4", 5/8 won't cut it and will break

Build the box between 1.6 and 1.9cuft gross

And fit a psp 18" flares 4" port

1.6gross =1.2 net @37hz

1.9gross = 1.5 net @33hz

If you plan on latter increasing the power over 800 each build 0.6 each if under 0.75 is ok

Edited by john253a
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