Let the hive mind of Engadget get that for you.
"I've found myself using my PC for a lot of conversations lately, and I'm also considering recording a podcast to share with anyone who will listen. There are tons of USB headset / microphones out there, and I'm hoping someone has some solid recommendations based on experience. I'll consider both headsets and standalone mics, by the way, but I'd like to keep the bill under $100 if possible. Help!"
If you hit the link to the Wilson Audio site, they give dimensions. 59" tall.
tl - those ports probably are close to 6" diameter, and to make just one make audible air flow you would be so over powered by the woofer output you would never know.
Needless to say, 21k for two custom 15" drivers and an automotive finished high end cabinet... sounds exactly like Wilson Audio.