I have my spare 800 in the studio and do all my mixing through the internal speakers - If the 330 works out, I'll get another one for the studio and mix everything just as it would be on the job. Interesting question, thx.
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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