JBL SYNTHESIS SDP-40HD - Manual (Page 78)

Setup JBL
3-38
You can use the remote control 7/5 button to toggle between 7-
and 5-channel playback. When you use the 7/5 button, the
SDP-40HD automatically:
• Activates ASA processing during 7-channel playback.
• Deactivates ASA processing during 5-channel playback.
• Switches between the 5.1 THX ULTRA2 and THX, DTS THX ULTRA2
and DTS THX, or 5.1mc THX ULTRA2 and 5.1mc THX listening modes.