Happy Sunday. I can say I have a love affair with the 3X and the 4X is even more incredible.

As far as sound, OMG, run in stereo speakers (QSC8S/10S) or others to bring out the beauty of the board.
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Yamaha 920 / Yamaha Stagepas 100 BTRs / Senn e935 - LIVE
Roland RD 2000 / Tascam DP24sd / ATEM switcher - STUDIO