Elipson Legacy 3220 Manuel D'utilisation page 11

Finally, adjust the loudspeakers orientation by turning them
gradually toward the center of the listening area. If you leave the
speakers parallel, you may want to bring them closer together, if
you orient them more than 30°, you may increase their spacing.
Connections
It is essential to connect the speakers using the correct polarity.
Make sure to connect the " + " terminal of the speaker (Red)
to the " + " output terminal of the amplifier. Then, make sure to
connect the "- " terminal of the speaker (Black) to the " - " output
terminal of the amplifier. A wrong connection would cause a
cribled stereo image and loss of bass. For mono-amplification
use, connect the terminals via the provided straps and connect
the cables to 2 terminals (+ and -) only. Use high quality speaker
cable.
ALL THE CONNECTIONS MUST BE MADE WITH THE
EQUIPMENT TURNED OFF.
Elipson Legacy 3220