Guys,
Just to be clear, this is a very large planter (two feet tall) that costs much more than $20 at Wal-mart. It's also aimed for the hi-fi market, where it's often impossible to have any visible bass trapping due to spouse concerns. The only other products that aim for stealth corner trapping are nowhere near as effective. Here's a perfect example of "corner traps" that are literally the size and shape of a teenage girl's bikini bottom, plus a very narrow fabric strip, at similar prices:
e i g h t h n e r v e
I have $100 that says four corners treated with these will make
no measurable improvement at all.
--Ethan