Pretty close from what I understand.

One of the heavy hitters here once told me to model somewhere between 1cft. and 3cft. to simulate a leaky car door. I know... It's a broad range, but it shows you are on the right track.

 

A car door is not going to act the same as an actual sealed box. It's better just to think of it as IB, therefore I'd use a larger amount like over 1.5 ft3 to try an simulate what's going to happen. Also since they will be used as mid bass I presume, I'm not exactly sure what you want to model.

 

Thanks for the confirmation.

Im trying to figure out what the low end curve is going to look like for a few different potential 8's crossed at about 250hz and down... (-3db point, etc)

 

Thanks for the confirmation.

Im trying to figure out what the low end curve is going to look like for a few different potential 8's crossed at about 250hz and down...

Are you going to run them 250 all the way down with no high pass, or band passed between whatever and 250hz?

 

In a hypothectical or ideal setting they will show hypothectical or ideal results

I n reality , stick it where you will [ you are going to anyhow ], and hope that it sounds good

As power becomes a factor [ size of piston length of stroke ], all sorts of unplanned things will happen

Do you know your car door inside and out ? [ will the backpressure escape through the weep holes and the window seals ? ]

Here try this take a panel off of your subwoofer,[ front , side back, etc.., ], now crank it just like you normally do [ can you hear how it sounds different with no acoustic spring ?

Can you hear it bottoming out ?[ search for threads about midbasses ]

example: my speaker is rated for x amount of power, "weird", it makes funny sounds way before that ...

 

Ideally plot a frequency response you relly like [ totally flat no peaks no dips ], then look at the size it says for that curve.

Now here is where your eye will help , no the difference between a size 6 or 8 and a size 14 or 18 ?

If you feel no compulsion to look twice [ she is the size your door will need to be to match that flat frequency response you modelled ].