Title: SiImpactUserManual_V1.4_screen_original.pdf
You can check if phase is an issue by switching the Phase by 180 degrees on ONE of those channels (use the PHASE button for that audio channel in the IN section of the ACS - 7.2.1). If the audio comes back, then look for the cause of the phase issue - it may be that a balanced connection has been wired incorrectly, for example.APPENDIX 01: NO SOUND?User ManualAPPENDIX 01: NO SOUND?NO SOUND?Is the Gate shut?