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Can someone help me understand the following graph generated in WinISD? I'm a complete newbie in this tool.



I plotted it for 2 Kappa Perfect 10.1s in a vented enclosure.

Is this graph shape good for SQ? In what way can it be made better? Any 'rule of thumb' to be followed fo box design?

The violet line corresponds to -3db at 30Hz and the red line corresponds to 0db at 35Hz. What does this translate to in terms of sound?

I'd like to finalize on the box specs for best possible SQL before I call in the carpenter. So gurus please! :)