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December 25, 2020 at 7:13 pm #156668
I notice Send A has a Hi-Z switch. Have you tried using it with it on and off? Have you tried connecting the H9 using Send B instead of A?
Yes i have tried using both Send 1 and 2 and Return A, B, C, D. I have also tried switching Hi-Z on and off. There is a difference in output level and when compensating via the gain the hum noise is still there. Even if I run the gain level very low and again with no signal the hum noise is there, quieter but still noticeable.