Hi Zuki
This is exactly what I do.
Straight from Mixer into the Bose.
I had to use a Y connector when using one Bose because of wave cancelation. It's known with Yamaha KB's.
Hopefully Korg works better.
Even though one works well for small gigs the Bose sound Soooooo much better in stereo. Much fuller sound.
They are light weight enough to schlep one extra.
Eric
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Genos, PSR-S970, TC Helicon VoiceLive3, Mackie 802-VLZ3 Mixer, 2 Bose L1 Pro16, Electro-Voice ZXA1 Subwoofer