HELP ME I'M DROWNING; Making my first box

[iiJonathan]

Does this look right?

Should the external port section be 20 or 14 since only 14 is outside the box.

The minimum for 3 Sa's is 1.50 :S I may be able to invert one in the center where the bench seat comes inwards for the console but that'd only give me an extra

.08. I'm not sure how much bracing is going to do me in for.

Edit: been playing with the dimensions and I've added like .5's to certain areas, and with .10 displacement I can pull a solid 1.50! My two questions now are; Will .10 bracing be enough, and since this is a wedge design box, the aeros will not be coming out of a flat surface, but rather the sloped part due to the actual top being underneath a rear firewall lip (stupid design) Will that affect what's going on?

 

[Better-Action 10+ year member]

Doing the aeros like that shouldn't pose a problem. One thing I didn't think of is the mounting depth of those 8's.

I don't think you'd need much bracing for a box that small. Maybe just 2 1" round wooden rods going from the back wall to the front, know what I'm saying?

And only 14" of the port would be external so you have it right in the pic.

If that mounting depth on those eights kills it a good alternative would be a beefier single 10" mounted in the center inverted. In a single cab a decent box and a beefy 10 with some power on it will get you excellent output.

And Torres automatically deducts port space from volume. Change the length of the port and you'll see that the internal volume of the enclosure will change. Does it all for ya.

 

[bbeljefe]

You should seriously consider losing one of the woofers. Those minimum manufacturer recommendations are for high SPL and power handling and don't consider much where sound quality is concerned.

Two SA8s on that power in a good sized ported box will be loud as hell and will produce good low end. Add a third and you won't get the lows you want.

Unless of course, you're building a burp box and don't care about sound quality...

Oh and, here's another option if you absolutely can't live without three woofers. Put two behind the seat and put one in the console box you mentioned building. Or vice versa, depending on how much space you have to build the console box.

 

[Better-Action 10+ year member]

You should seriously consider losing one of the woofers. Those minimum manufacturer recommendations are for high SPL and power handling and don't consider much where sound quality is concerned.
Two SA8s on that power in a good sized ported box will be loud as hell and will produce good low end. Add a third and you won't get the lows you want.

Unless of course, you're building a burp box and don't care about sound quality...

Oh and, here's another option if you absolutely can't live without three woofers. Put two behind the seat and put one in the console box you mentioned building. Or vice versa, depending on how much space you have to build the console box.

Phase issues booooooo!!!!!

 

[iiJonathan]

This is all very good advice, I'm currently in the denial stage of losing my third woofer, but I'm slowly coming to the realization that I won't be all that happy with a 3rd. I am however, going to use aero's for the two because I realize how much more awesome they are than slots. I'm definitely going for some SQ, and I hate the one note wonder burp boxes. In the end, I'd rather have two subs in a nice airspace than three crowded, but thanks for helping me out everyone, this really got me even more excited for my build and I definitely gained some knowledge.

Yeah, I was gonna use those rounded ones I see everyone use for bracing.

I'm thinking that the mounting depth will be alright, they are only 6 5/8th's, so if I'm starting with 10" at the bottom I should be alright.

With the aeros facing up I'll probably get some good bass. Do you think the fact that I'm in a small cab would add to the flex or take away?

Edit: You guys think I should put both aeros on drivers side or split them between the pass and drivers for better sound localization.

 

[iiJonathan]

2 SA-8 V2's at 1 Ohm running 1k a piece in a 1.40Cu3 33Hz box it is.

 

[bubbagumper6 5,000+ posts]

You've actually clarified aero ports so much for me with just that statement. I'm definitely going to look into this, 33 hz isn't as important to me as it is having 3 subs. 

---------- Post added at 11:02 PM ---------- Previous post was at 11:01 PM ----------

 

Are you talking about if I use an aero or slot port. If I use an aero there will be no "port wall" correct?

There will be no wall but the volume inside the port CANNOT be counted towards the net volume of the enclosure. It's not usable airspace.

 

[Better-Action 10+ year member]

This is all very good advice, I'm currently in the denial stage of losing my third woofer, but I'm slowly coming to the realization that I won't be all that happy with a 3rd. I am however, going to use aero's for the two because I realize how much more awesome they are than slots. I'm definitely going for some SQ, and I hate the one note wonder burp boxes. In the end, I'd rather have two subs in a nice airspace than three crowded, but thanks for helping me out everyone, this really got me even more excited for my build and I definitely gained some knowledge.
Yeah, I was gonna use those rounded ones I see everyone use for bracing.

I'm thinking that the mounting depth will be alright, they are only 6 5/8th's, so if I'm starting with 10" at the bottom I should be alright.

With the aeros facing up I'll probably get some good bass. Do you think the fact that I'm in a small cab would add to the flex or take away?

Edit: You guys think I should put both aeros on drivers side or split them between the pass and drivers for better sound localization.

Good choice. And with more airspace to play with you shouldn't have to go external port. I've been told that subs on passenger side and port on driver does great in trucks. And it wasn't wrong. Had a single 15" on 2k flexing my back window 2" and incredible lows in my extended cab s10 with it.

One idea is if you could shorten the box width wise about 3-4 inches you could do one large port firing out the bottom driver side towards the wall. Heard good things from that configuration as well. Like 1 6" Aero. I did this side firing port setup with 1 10" and a 4 inch Aero tuned to 35hz and it sounded great in a Dodge ram single cab. Very tight and punchy sounding.