......A speaker can be tested for phasing very easily. Take a nine volt rectangular battery and look
for the positive and negative terminals. Find the same terminals on your speaker. Touch the
battery to the speaker terminals + to + and - to -. Do this only for a second as holding the battery
on the speaker for any long period of time can damage the speaker. Note which direction the
speaker moves when the battery is placed on the terminals. If the speaker moves in an outward
motion, then the speaker can be said to be in phase. If the speaker moves inward with the
battery test, then the speaker is considered out of phase. Now, as long as all your speakers in
the same frequency range move together the same way, then they can be considered to be in
phase with one another. The most important fact is to have all devices in the same frequency
range moving in the same direction. To change the phasing on a speaker, reverse the wires to
the + and -.
