JBL SYNTHESIS SDP-40 User Manual page 140

MODE ADJUST
Listening Mode Menu Parameter Descriptions
(continued from page 5-41)
SURROUND MIX
Controls the relative level of surround channel information sent to
the Main Zone audio output connectors labeled Front L/R. It is
recommended to set this parameter to +2 or +3dB for all input
sources.
VOCAL ENHANCE
Controls the level of dialog boost in the Main Zone audio output
connector labeled Center. Increase this setting to improve dialog
intelligibility, particularly at lower volume levels.
5-42
-5 to +5dB
+6.0dB, +3.0dB, +0.0dB
JBL