(which is about 60Hz). I think I'll run the K&H's through the sub's crossover to begin with, do some testing, and then try things the convenient but dangerous way, through the Presonus, and see how much worse the results are. Not quite sure how to set up a test for phasing problems at the low end, however, or if my ears are good enough to catch such problems myself. Meanwhile I removed the cleat from in front of the whaleTrap and it still resonates like a timpani. There never seems to be an end to the issues, is there? I keep running into them just when I think I am about done myself! Regarding the window... I ended up having to cover my CR window with a small bass trap, even though I was really looking forward to the natural light. It was a necessary evil in order to get the sound tamed down to where I am able to mix in the place. It really sucks, but once things get rolling here in the next month or so, I hope take it down during tracking, and then hang it back up during mixing. That may end up backfiring on my since I need to be able to judge mic placements and choices, and if I compromise my acoustics during tracking, I may lose the ability to make those choices appropriately. I bring this up for 2 reasons: 1) You might need to do what you need to do if