Hi. A novel idea, but very limited, IMO. I've tried this bar several times over the years.

1. Any mic I tried will feed back
2. Very limited bass range
3. Very low overall volume
4. Expensive vs a nice stereo PA system

Just my thoughts.
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Yamaha 920 / Yamaha DGX-670 / Maui 5 Go (2) / Senn e935 / Sony C80 / Tascam DP24sd / ATEM Mini Pro switcher (studio)