Sub project-construction technique questions

[Relax]

why would you want a higher loss? or is that the panel's reverse output below the drivers output?

Like:

The driver puts out 100 db, at -25db from panel, meaning 75db output heard?

or the panels output 75db of negative wave?

or 25db of opposite signal?

 

[noah katz]

Right, the panel output is opposite of the drivers', so you want it low

 

[BassAwdyO]

I'll clarify

Noah means when the driver's output is 100db then the panels' output is 75db. The panel output is 25db lower thus -25db relative to the driver.

 

[dscline]

A few months ago I did FEA (finite element analysis) of a 16 cu ft sealed box made from 3/4" plywood, for a pair of Avalanche 18 drivers. ... I was hoping to satisfy myself that an unbraced box would be fine.

I've been concerned by some of the things people have said that I'm not planning enough bracing. But that's a size I would have never considered to do w/o bracing, so now maybe I'm not so far off.

I'll just cut to the chase. I'm building a box that is a tall slender column: about 15" square by about 36" high, which will contain two 12" drivers, but it will be separated into two separate chambers. So essentially, I'm looking at two 2.1 cu ft boxes with a 12" driver each. But the divider panel in the middle of the column will be arranged at an angle, so the largest panel in each section will be about 25" x 15". All other panels will be smaller than that. So how much bracing would people suggest? Based on the previous recommendation of 6-12" between braces, the 25" panel would need two braces. To me, that seems like overkill for this small of a box.

 

[BassAwdyO]

One brace should be fine. I wouldnt even put braces on 15" panels.

 

[wunderaa]

Dry Assembly

 

[wunderaa]

Dry Assembly 2

 

[wunderaa]

Drivers

 

[wunderaa]

Enclosure before bracing

 

[wunderaa]

This is my DIY amp that will be driving the subs. Only about 1/2 way done right now.