Cadillac 2005 XLR Owner's Manual page 247

To adjust the tone for each preset, do the following:
1. Press the BAND key.
2. Touch AM, FM1, FM2, XM1, XM2, or WX, if
equipped, to access the desired preset screen.
3. Touch SOUND.
4. Touch the plus (+) or minus ( ) signs to adjust
treble, mid-range, and bass.
5. Touch Return to exit. This will take you to the
preset station menu.
6. Touch and hold one of the six preset screen
buttons for more than two seconds until you hear
a beep.
Whenever you touch that preset for less than two
seconds, the station and previously stored
information you have entered for each preset
station will be recalled.
7. Repeat the steps for additional presets.
Adjusting the Speakers
DSP (Digital Signal Processing): The DSP feature is
used to provide a choice of four different listening
experiences. DSP can be used while listening to the
audio system or the CD player. The audio system can
store separate DSP settings for each source and
preset station, except WX, which is always set to TALK.
To save DSP settings for your preset stations, use
the SOUND menu or touch DSP from the preset station
menu to access the DSP menu. See "Sound Menu"
listed previously in this section for more information.
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