If passthrough isn't enabled, then the classroom speakers connected to the projectors won't work if the projector is turned off.
Applies to models VPL-PHZ61/PHZ51
Step-by-step guide
Disable internal speaker, and ensure audio output is always on.
- Press the MENU key
- Select 'Function' - 'Speaker' and set to "Off"
- Select 'Function' - 'Speaker Setting' and set to "Always On"
Related articles
- Configure Epson Projectors for Audio Passthrough
- VPL-PHZ61/PHZ51 | Help Guide | Connecting to Audio Equipment (sony.net)
- VPL-PHZ61/PHZ51 | Help Guide | Menu Operation: Speaker (sony.net)
- VPL-PHZ61/PHZ51 | Help Guide | Menu Operation: Speaker Setting (sony.net)