Sealed SI 18" Car Sub

[fuzz092888]

So a friend of mine asked if I could build him a subwoofer for his car. He ended up getting an 18" SI sub, per my recommendation and he dropped it off to me today. Unfortunately, I didn't realize how small his trunk is, being that it's a Subaru WRX STI. I think I can still make something that will fit and perform decently well, but I guess we won't know until it's done.

Shots of the driver

 

[Bryceo]

Slot or wedge port box perfect

 

[fuzz092888]

Neither would work. The trunk is too small to fit anything except a sealed alignment. Plus, the SI subs aren't really best ported. At least from what I've modeled and seen.

 

[darien87]

An 18" in a car?!?! What is he doing SPL competitions or just trying to blow his windows out?

 

[fuzz092888]

An 18" in a car?!?! What is he doing SPL competitions or just trying to blow his windows out?

Trying to blow his windows out I think lol. I told him to get the 15", but he ordered the 18", not that either is exactly appropriate for the car in question. Especially since the box I had planned for the 15" was gonna be tight. The box for the 18" is just going to be silly tight. I'm a little afraid he might tap the trunk door if he cranks it too loud

 

[lsiberian]

I'm pretty sure that driver needs a big box, but it's been a while since I modeled it. Seriously why would you add that much weight to that car. He need to take out stuff not add it.

 

[fuzz092888]

I'm pretty sure that driver needs a big box, but it's been a while since I modeled it. Seriously why would you add that much weight to that car. He need to take out stuff not add it.

My model has the driver in a box that's 67.63 liters, with a Qtc of .752, and an F3 of 38hz. How far off am I from yours? He ain't the brightest bulb in the box, and he drives that little race car like he stole it. Why he wants a sub this big in a car like that is beyond me, but it gives me something to do and I get to play with the subwoofer until he's ready to install it so I was in

 

[BMXTRIX]

When you're done with that, we can talk about building something for my car. Tight space would be an understatement on mine.

 

[fuzz092888]

When you're done with that, we can talk about building something for my car. Tight space would be an understatement on mine.

Well first I would recommend not buying an 18"

 

[lsiberian]

My model has the driver in a box that's 67.63 liters, with a Qtc of .752, and an F3 of 38hz. How far off am I from yours? He ain't the brightest bulb in the box, and he drives that little race car like he stole it. Why he wants a sub this big in a car like that is beyond me, but it gives me something to do and I get to play with the subwoofer until he's ready to install it so I was in

I'd probably try an IB in the car first, but please do play with the driver for us.

 

[fuzz092888]

I'll definitely be putting it through its paces when the box is built and I'll do a little playing with it free space as well.

 

[fuzz092888]

I'd probably try an IB in the car first, but please do play with the driver for us.

Well, that didn't last long. I unhooked my little sub for my 2.1 computer setup and now have the SI hooked up, running free air. I never listen loud enough to even begin to stress the thing (at least when the speakers are a foot from my face, even in free space. Right now my a$$ is vibrating, which is oddly enjoyable. I'm starting to see why people like these SI subs.

 

[lsiberian]

Well, that didn't last long. I unhooked my little sub for my 2.1 computer setup and now have the SI hooked up, running free air. I never listen loud enough to even begin to stress the thing (at least when the speakers are a foot from my face, even in free space. Right now my a$$ is vibrating, which is oddly enjoyable. I'm starting to see why people like these SI subs.

Now you know why people become bassheads.

 

[BMXTRIX]

Now you know why people become bassheads.

But then they drive down your street a two AM with it blaring and you recognize that they are really just bassholes.

 

[fuzz092888]

But then they drive down your street a two AM with it blaring and you recognize that they are really just bassholes.

That's why I'm glad I live in the woods

 

[lsiberian]

But then they drive down your street a two AM with it blaring and you recognize that they are really just bassholes.

I guess it doesn't bother me. Around here the engines are louder than the stereos.

 

[fuzz092888]

I've got all the materials. I've verified the sub works. Now I just need that last magical ingredient.........time.

 

[fuzz092888]

Well, it's a box. However, I try to always add something I've never done before into every build I do so this build I'm trying two new things. The first is using a trim nailer instead of clamps and PL200 instead of wood glue.

 

[crossedover]

I'd still glue with the trim nailer. That's a big arse driver lol

 

[Alex2507]

I'd still glue with the trim nailer. That's a big arse driver lol

The PL200 he mentioned is a liquid nail type glue in a caulk tube. He just meant that he wasn't using normal wood glue.