I have everything from a A&H FX10 to Yamaha MG06 and 10x. I agree that there are many times I need good mixers. However, for my quickies, it is an overkill when I use the keyboard mic and aux in inputs.

I took the Audya to band today and she was as strong as ever without a mixer at all.
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pa4X 76 ,SX900, Audya 76,Yamaha S970 , vArranger, Hammond SK1, Ketron SD40, Centerpoint Space Station, Bose compact