First enclosure build

[Jrrtt09 0]

I'm designing a box for a 10" sub to go behind the seat of my 1988 toyota pickup extended cab. I have an air compressor behind the drivers seat and I don't want to lose access to my jack and tools behind the passenger seat. The floor is uneven so it takes up a lot of volume.

Here are pics of the area i have to work with.

And here is a basic design i made on sketchup

It is 1.66 cu ft before sub displacement and port. I'm looking at an fi ssd sub and a 1000w rms amp, but I'm open to other suggestions. The sub will be facing the front. I have a formula for tuning a port and I'll probably do a slot style port but I'm not sure where in the box to put the port or how much area the port should have.

[mklett33 32]

The port should have 12-16 square inches of port area per cubic foot. So for you 19.92 - 26.56 square inches. This is to cut down on port noise. I would try to go with the larger of the two sizes, but as you will see the larger port area will also require a longer port for proper tuning.

What are you thinking about tuning at?

And SSD's are awesome, nice choice.

[Jrrtt09 0]

Thanks for the response, I'm thinking 33hz, I want it to get low.

[Jrrtt09 0]

I'll probably use the small section above the air compressor as part of the port and extend it as much as needed, It'll be firing to the drivers side, with the sub firing front. I think the port will have to be over 30" so should i'll have to turn it 90 degrees somewhere.

[dbsupra 69]

Let's back up a little here.

Port area is based on driver xmax and tuning. Not volume of the enclosure. I hate the rule of thumb. It may be a rough guideline but not the end all be all.

Also it isn't just for port noise but port compression as well.

Port length. You have to 90 degree the port wall at the width of the port to the perpendicular wall. You can't just 90 it anywhere.

What is the compressor for? Air tools or do you off-road?

Lastly I have an obsession for 80/90's Toyotas. So much so I currently own 3 haha.

[Jrrtt09 0]

So do I have to 90 it at the far end of the enclosure? And the compressor is for a train horn, I can move it if i have to.

[Jrrtt09 0]

I downloaded the torres calculator and came up with this, The port area is only 13.5" but I won't have to 90 it anywhere.

[dbsupra 69]

Let's say you use a 3" wide port. If you have to 90 it to fit the port length you have to maintain the 3" width thru the entire length ie port straight back to the wall, 3" of space and then 90 to the rest of the length. Also you measure port length thru the middle.

Just looked at your plans and that isn't near enough port area for an SSD.

For your space constraints you may consider a passive radiator. It's more money and you can't just slap it in there but it saves a ton of space.

You may also consider a full external aeroport. You can get away with a bit less port area with an aero and simple to install and tune.

[dbsupra 69]

I did the math for you. You need around 25 sq in for a slot port to prevent port noise and compression.

Assuming for the Fi SSD 32-34hz tune

[Jrrtt09 0]

Thanks for the info! I'll research aero ports when i have time. And i may move the compressor and tank. Perhaps turn it 90 degrees.

[Jrrtt09 0]

I've decided to move the compressor to the other side of the cab. Now i can fit a 3 cu ft box before port and displacement. So i guess i can go with a 1.2 cu ft box and maximum port area. The Sub will still be facing forward. My question's are;

What is the best enclosure volume to go with after port and displacement.

What is the best port area to go with considering the enclosure volume.

What is the best place to fire the port, I was thinking up or side.

Sorry for being lazy and not figuring this out on my own, I just figured you guys could save me some time.

Thanks

[swift 501]

Why not move the compressor to the bed. That has to be loud and annoying as hell.

Just a thought

[Jrrtt09 0]

I had it in the bed for the first month, but it started rusting so I moved it in the cab. The humidity down here is horrible. And it's not as loud as you would think, and it only runs for about 45 seconds at a time only after I blow the horn.