Kalman Rubinson wrote in
:

On Sat, 25 Apr 2009 21:41:14 GMT, "Brian Gaff"
wrote:

Why not use a test cd with some frequency sweeps on
it?

You can also download test tones from the web to burn
on to a CDR. Try
this one: http://www.realtraps.com/test-cd.htm

Best used with a sound level meter or other
measurement device.

Kal



Kal,
thanks for the link. I downloaded the tones.
First thing I learned was how much the bass note volume
changes as I move around the room.
Second, what I had thought was a fault in my right
speaker turned out to be a rattle in the printer on the
desktop by the speaker! Only a long continuous tone
allowed me to track it down.
Thirdly my sub-woofer does, on first listen, play all
the tones.
So the problem may have more to do with the harmonics of
the room size than the sub-woofer. I need to
investigate further.
Davy