*** Potential Install Issue on new HT build ***

[rms8]

Hi All,

I have attached a pic of our basement blueprint.

Nothing is finalized as we will not be breaking ground until April/May.

I am having an extra room added to the basement under one of the garages via SpanCrete.

RED = Concrete walled room under garage#2.
BLUE = wall where 4' door will go
GREEN = proposed framed walls (rough)
YELLOW = rear concrete wall which will have a 4' opening into the rest of the basement (exact location still undecided.

My plans are to have a small recessed wet bar on the rear wall. The IB arrangement will be on the front wall at the bottom. It will be eight Fi-IB318's in a row spanning the bottom of the wall.

Hopefully from the crude lines I drew in one can see that the framed walls will not be tight against the concrete. The front wall will be framed ~ 1' from the concrete wall and the right side framed wall (opposite the "door wall") will be framed ~ 18" from the concrete wall. This space would allow me to creep back to the front wall, but behind it.

Here is my concern....
Since this is an IB setup....does the space immediately behind the drivers have to be 4-10 times VAS, or can the whole unsealed volume be 4-10 times VAS.....meaning....the air space immediately behind the drivers would barely be enough for 4 times VAS, but since the air is free to move throughout the whole basement via the 4' opening along the rear wall of the concrete....will this still work?

I hope that is clear??

I'm afraid that it will work more like a ported sub due to the 18"x10' cavity (the opening which allows me access behind front wall on right side) which leads to the 4' opening to the rest of the basement.

Attachments:

[ThomasW]

Hi,

Feb 2, 2012 8:49:51 GMT -7 rms8 said:

Since this is an IB setup....does the space immediately behind the drivers have to be 4-10 times VAS,

Yes

You've got a room some 30' long, seems to me you could move the screen wall out a just bit more and not notice the shorter room

[rms8]

THANKS Tom.

Would it help/hinder the subs/rooms performance if I didn't put all eight along the bottom of the front wall and perhaps mounted four up front and four along the back (all IB BTW) ?

[rms8]

In this iteration I have swapped the screen wall. Makes more sense this way anyway due to the indent on the back wall, which would be perfect for the wet bar.

The YELLOW line depicts where the opening in the concrete will be. This would allow the IB318's to the rest of the basement.