Stupid Isobaric Subwoofer Question. (1 Viewer)

[Stephen Weller]

I'm leaning heavily toward a DIY isobaric sonotube design, to maximize the WAF. Then I had this thought (Uh-oh!):

If two clamshelled drivers effectively halves the cabinet volume, would two clamshell assemblies (wired appropriately) effectively quarter the cabinet volume?

Just thinking outside the "box."

 

[Seth_L]

Yes it would, but they're hard to couple.

 

[Stephen Weller]

You mean acoustically. Right?

It could make for some fun experimentation anyway.

 

[Seth_L]

Right, it's hard to couple the two clamshells together.

 

[Bryan Michael]

what about the design of the b4 by svs that is allmost the same as a push pull

 

[Stephen Weller]

Oh, no. That's not what I thought you meant.

*I* meant one clamshell assembly at one end of a sonotube, and another clamshell assembly at the other end of the tube. Wired correctly, all four drivers will push-pull in unison. Follow?

And will it really quarter the required cabinet size?

 

[Stephen Weller]

It's very pretty. But I'm looking for invisible.

And is it isobarically coupled?

 

[Dustin B]

A clamshell assembly at either end of the sonotube wired to operate as a dipole is what you've suggested.

The two clamshell assembles in this config won't quarter the volume requirement. Each one by it self will half the requirement of volume, but only be capable of the output of a single driver in an enclosure twice as big.

Putting them in the same enclosure on either end will double the volume requirements and double the Vd. But as soon as you wire them like a dipole you'll end up with major bass cancellation issues.

 

[Seth_L]

I'm pretty sure the B4+ is just 4 drivers in a box.

 

[Stephen Weller]

BINGO! The light just went on. It's a dipole. Never
mind.

But thanks!