# Ram underseat

#### SteelKiller

##### Junior Member
10+ year member
Well......I'm back again!!! Gonna do it this time!!! I have the power so now it's time to build. I have a basic design but am not sure how to calculate volume with a weird shape. I will attach a pic but it's not mine and I have
reached out multiple times asking to buy design plans ect.... sealed.....2-10" drivers or 4-8" drivers. Of course I know it all depends on 3space but. I have 1500 of under rated class d with 1/0 ran to the connection point. Any way to make an educated guess/calculation on volume?
Thanks

#### Bobbytwonames

##### Trigger Man!
5,000+ posts
You need to calculate the front wedge and then the back wedge. Then just add the square inches up and divide by 1,728.

#### Jimi77

##### CarAudio.com VIP
Break the shape up into cubes and prisms then add their volumes together.

#### Bobbytwonames

##### Trigger Man!
5,000+ posts
Break the shape up into cubes and prisms then add their volumes together.
What? Prisms? Really? Doesn't anybody know how to calculate the airspace in a wedge box?

#### Jimi77

##### CarAudio.com VIP
What? Prisms? Really? Doesn't anybody know how to calculate the airspace in a wedge box?
Do it just like I said and you'll get an accurate answer. Perhaps you didn't know a prism and wedge are the same thing.

#### 1aespinoza

##### Junior Member
Any way to make an educated guess/calculation on volume?
Thanks
On a wedge, you add the tall and short heights, divide the answer by 2. Then multiply that by the area of the entire top panel. Now measure the "notches" and subtract from the overall size.

#### Bobbytwonames

##### Trigger Man!
5,000+ posts
Do it just like I said and you'll get an accurate answer. Perhaps you didn't know a prism and wedge are the same thing.
Ok, whatever you say genius.

#### Bobbytwonames

##### Trigger Man!
5,000+ posts
On a wedge, you add the tall and short heights, divide the answer by 2. Then multiply that by the area of the entire top panel. Now measure the "notches" and subtract from the overall size.
Finally, somebody with some math skills.

SteelKiller
OP
S

#### SteelKiller

##### Junior Member
10+ year member
Ok, talk to my local shop.....he says front firing is less desirable than up or down firing?!!! WTF!!! He says something about the sound wave doubling easier? I understand to a point but isn't there such a thing as too close? Also, he says 1200-1500 isn't enough for 4-8" L7 or similar, what do you think? Sealed is my preference.

OP
S

#### SteelKiller

##### Junior Member
10+ year member
Finally, somebody with some math skills.
I have basic geometry skills, just looking for an easier(quicker) way than breaking out the old tape measure!!! I'm lazy in the planning stage!!!

#### Jimi77

##### CarAudio.com VIP
Ok, whatever you say genius.

View attachment 46693

#### Jimi77

##### CarAudio.com VIP
I have basic geometry skills, just looking for an easier(quicker) way than breaking out the old tape measure!!! I'm lazy in the planning stage!!!
Some people will fill the enclosure with packing peanuts and then pour the peanuts into a box find their volume. I guess if you have bunch of packing peanuts laying around, that works. Not sure if saves you much effort.

#### Bobbytwonames

##### Trigger Man!
5,000+ posts

A wedge isn't a triangle kid. A wedge has four points. You are out of your lane. Go argue politics. I'm not arrogant. I'm smart.

#### Bobbytwonames

##### Trigger Man!
5,000+ posts
Some people will fill the enclosure with packing peanuts and then pour the peanuts into a box find their volume. I guess if you have bunch of packing peanuts laying around, that works. Not sure if saves you much effort.
Might as well do a cylinder volume test. What size packing peanuts? What is the formula for packing peanuts to airspace volume? Because everybody has a shitt load of packing peanuts laying around to calculate their subwoofer box airspace. It's simple wedge box math kid. A two minute problem..

#### Bobbytwonames

##### Trigger Man!
5,000+ posts

That's a fukking triangle not a multi-dimensional wedge. You are a funny kid. Why not do it with a pentagon or octagon?

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