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October 17, 2014 at 5:26 pm #126850
Checked all connections. Everything's fine. Power supply is not the issue. Again, when used alone the H9 is dead quiet. When used without the H9, the other three pedals are dead quiet. When they are all in series (regardless of the cable used to connect them), there is a low hum even when none of the pedals are active. I just can't figure it out.