cassp

The 808S is a "Stereo" board. The 808M is a mono board. If you have the 808S then it has Stereo capability.

On the other hand, if your PA is just one Speaker then even though you have a Stereo Mixer you won't benefit sound wise unless your PA uses two speakers when running the Y2K through the 808S.

Best regards,
Mike
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Yamaha Genos, Mackie HR824 MKII Studio Monitors, Mackie 1202 VLZ Pro Mixer (made in USA), Cakewalk Sonar Platinum, Shure SM58 vocal mic.