They should add mounts for an HK Audio (Korg is the distributor in the USA) solution for the Pa4X. Separate sub and the Mid/High speakers attached to the keyboard. Then there will be room for a boom and a music stand or iPad mount.
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~Johnathan
"The Shueys"
www.shueymusic.com
Yamaha Genos - RCF M20x - RCF HD10A (Stereo) - Jupiter Pocket Trumpet - Sennheiser e935 - Neumann KMS-104 plus-N