auna SELECT Reference 801 Manual page 29

EN
Incorrect connections on individual speakers will not damage the
amplifier or speakers, but the sound will seem "diffuse" and poor in low
bass. Therefore, if you are dissatisfied with the sound characteristics after
connecting, first check all connections!
Reference 801 - Bi-Wiring (Double Wiring)
Separate speaker cables for the high/mid range and the bass range can
further improve the sound of the Reference 801. If your amplifier has 2 pairs
of PLUS and MINUS connectors per stereo channel that can be operated
simultaneously, please connect your Reference 801 as shown in the
illustration.
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