jclause wrote:

Hi Andy Set your amplifier or receiver to monaural
(mono) and play
a recording (voice works well), otherwise play a mono
recording. When
you are positioned midway between the speakers, the voice
or sound
should appear to come precisely from midway between the
speakers with
a clearly defined image, when the polarity is correct.
Otherwise the
sound will be diffuse and somewhat odd sounding, with no
clear image.
Switch polarity to ONE speaker - you will hear the
difference.
Absolute polarity is another subject. This is also
dependent on the
absolute phase of the recording and is somewhat
controversial.

Good advice. I've never seen a speaker that was damaged by
hooking up to a single "AA" battery. If you can see the
woofer cone, a AA battery should cause it to pop foreward,
if your wires are hooke up right.