[Just posting this for Google reference purposes; I know most any
regular participant here already knows this]

---

High-tech calibration equipment has its place, but nothing works better
than this tried and true, ridiculously simple method.

1) Place the subwoofer in the LISTENING position.

2) Put on a CD that you know has good lower base extension and play it
at a fairly loud listening volume.

3) Now, physically get down on all fours and slowly crawl around the
parameter of the room. Listen for a 'sweet spot' where the base is
noticeably tighter.

THAT's where you should position your subwoofer!

A_C

A_C,

3) Now, physically get down on all fours and slowly crawl around

That's a good trick, but the results depend on the key of the music that's
playing. Remember, the response in a room varies by location *and*
frequency. If the music's frequencies don't align with the room modes, this
technique may not work as well as expected. I think a better solution is to
play pink noise or some other "broadband" low frequency source while you
crawl around.

--Ethan