I was ready to use the Nano in my small acts with my PA3X but couldn't get a satisfactory acoustic piano sound (for my ears). Switched to powered 8s and the piano now sounds terrific.
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Live: Korg PA4X/EV Everse 8s/Senn 935/K&M stand

Studio: Korg PA4X/Yamaha DGX670/Boss BR900CD/Tascam DP24SD/MTM Iloud/Sony C80/AGK 214/K&M stand