First there was the $4,700 audio cable.
So now it shouldn't be too much of a stretch for you to imagine the $150 block of wood (on sale now, usually $200).
Oops. I'm sorry, did I say "block of wood" I meant "Acoustic System Phase Corrector."
According to Pure Music Group, this item "may look like a simple instrument grade maple block," and it does! At least you can't say they're not honest.
Oh, wait. That wasn't the whole sentence. "The Acoustic System Phase Corrector may look like a simple instrument grade maple block but its inner workings are more complex." It corrects blurring of phase coherency "by disrupting the energy pocket near the floor/front wall interface through a combination of resonance and diffusion."
I'm just sorry they don't have a link to the owner's manual.
[UPDATE: This one gets better. They no longer sell the wood block one at a time. They now sell them in sets only. Starting at $2,450.]