Question for the smart guys

[Oneslowmonte]

I'm kind of curious if I dug myself into a hole. I'm trying to fit 2 hdc3 15s in my 06 monte carlo by sealing off the trunk.

I came up with the dimensions as following

Height 18''

Width 37''

Length 26''

After displacement would be around 8.11..?? My first time figuring this out.

The subs are 15.5" wide so I'd be kind of tight for Aero ports wouldn't I?

Was planning on using a kreg jig to assemble in the trunk since it seems the easiest way to go from my research so far.

If anyone could drop some knowledge if I'm going the correct route would be greatly appreciated!

[Triticum Agricolam]

How much power are you going to be running?

[Oneslowmonte]

I have a hifonics 3216.1 right now with a 300 amp alt. Gonna get a battery next week as well to replace the stock one.

[rockFord_Expedition]

Mock everything up with cardboard.

[Oneslowmonte]

Mock everything up with cardboard.

Will do! I'll have my buddy snag some from work and see how it goes.. Looking at measurements trying to figure it out is driving me crazy

[MADVIBES]

I did a system that had 3 15" subs in a monte, I did a 4th order with the port blowing up through the rear deck, sounded great for 3 w6 15" subs, of course this was 2003 or 4 i think. when the subs were still black and made in the USA

[Oneslowmonte]

I did a system that had 3 15" subs in a monte, I did a 4th order with the port blowing up through the rear deck, sounded great for 3 w6 15" subs, of course this was 2003 or 4 i think. when the subs were still black and made in the USA

You have any pics of that by chance? I was curious about facing them up and doing that as well. Not sure how it would sound since everything I've ever had has been prefab set ups lol. Been searching and everyone says to seal the damn trunk off. I just had to buy 15s smh! Those jls need a ton of airspace too?

[Oneslowmonte]

I did a system that had 3 15" subs in a monte, I did a 4th order with the port blowing up through the rear deck, sounded great for 3 w6 15" subs, of course this was 2003 or 4 i think. when the subs were still black and made in the USA

You have any pics of that by chance? I was curious about facing them up and doing that as well. Not sure how it would sound since everything I've ever had has been prefab set ups lol. Been searching and everyone says to seal the damn trunk off. I just had to buy 15s smh! Those jls need a ton of airspace too?

Now that I've seen some pictures of 4th order boxes I'm gonna have to look into that lol

[hdorre]

you have 8 cubes, assuming youre doing a single layer box with a double baffle. Factor in sub disp, and youre looking around 7.6 cubes. With a decent port, lets say that eats up 3/4 of a cube.

Without any bracing youll have near 7 cubes net, but possibly a bit less.

As for port area.. if its forward facing, your max height is 16.5 (with a slot). Absolute max port width is 5.75", but i dont like playing THAT close. lets say 5.25" of width.

Basic multiplication gives you a max port area of ~86sqin.

This *could* work, but itll be tight, in almost every possible way.

Another thing to consider is actually fitting your box into the trunk opening. Many times, the opening is less wide and shorter than the actual trunk. As a result, you may need to either build in the trunk (kreg jig is sex) or cut down on dims somewhere. Unfortunately, you really cannot cut down on space.

My advice is to invest in a chiropractor, once this build is complete.

Good luck

[MADVIBES]

unfortunately I did not take any pics of that set up, it was pre smart phone so I usually just wanted to get jobs like that outta the way. you could even face subs forward and port up through the rear deck. That is always a possible solution, thats how I had my car for the longest and always had good numbers. there are so many possibilities with your system I am sure you are going to get a lot of good advice on here all with different ideas play around and find what works best. Its a race won by slow hard work not a sprint.