K10 active loudspeaker

QSC K10 1000W active loudspeaker. Accepts XLR or 1/4" mic or line input (A) as well as XLR, 1/4" or RCA line input (B), meaning you can mix two signals for playback using one speaker. Has XLR outputs. We have 5 of these as well as a KSub subwoofer in order to make a 5.1 presentation set. # engraved on top left corner