Hi Dave. Thanks for the reply. Have tried two different acoustic guitars and an electric bass. Tried different instrument cables also and its the same result either through PA speakes or headphones. Chris..
On my new XR18 I get a channel input level visible when I plug an intrument in which increases when the gain is turned up and produces a low hum audiable through the speakers on live use . This is when the intrument isnt being played. This doesnt happen when a mic is plugged into a channel. This happens on all channels.. Hi-Z or not. Have done a firmware update but with no effect. Has anyone had this problem?