Delphi XpressRC SA10316 - Manual (Page 54)

Turn the knob to increase or decrease the level .
Press the XM button .
Do not use the Line Out Level menu item as a volume control; use the volume control
on your car stereo instead . Line Out Level is used to adjust the volume level to match
other audio sources (your CD player, other FM stations, or MP3 player) .
TIP! If using your XpressRC in a home stand (sold separately) or audio system (sold
separately), press the XM button , then select Line Out Level .
Set the tone
(Audio system option -- audio systems are sold separately)
You can adjust the bass and treble to suit the kind of music you’re listening to .
Configuring your Xpress RC