Input Level Adjustment; Setup Cd - Contents - Alpine PXE-H660 Owner's Manual

INPUT LEvEL ADjUSTmENT

The overall sound quality of the PXE-H660 is determined by the adjustments made by the Dig-
ital Signal Processor. The accuracy of these adjustments are directly affected by the input to the
processor. Therefore, it is very important that the output from the factory radio be properly set so
the PXE-H660 receives the correct audio level (not so high that it's distorted and not so low that
it's noisy). This ensures that the DSP chip in the unit can see every detail of the audio signal. This
important step is done during the intital stages of the Set Up sequence.
The input to the PXE-H660 is equipped with an auto-ranging circuit. This keeps the DSP input at a
constant level for better noise immunity and signal processing. It is suggested that the factory head
unit volume level be set for the maximum undistorted level. To determine the factory system's
maximum undistorted volume level, play a well-produced, dynamic music track through the system
and turn up the volume until distortion is heard. Back the volume down to the maximum undistort-
ed level. Remember this volume setting, as you will need to keep the factory radio at this setting
during steps 5-9 of the setup procedure. Other functions such as factory EQ settings or position
settings must also be turned off. Balance and Fader positions must be centered.
SETUP CD
Imprint Setup Disc
1. Autorange Setup
This track is used with auto ranging to set input levels
2. AntEQ™ Calibration
This track is used with AntEQ™ for factory pre-equalization removal
3. Pink Noise
This track is used by the installer to make coarse adjustments to amplifier levels.
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