Clarion APX640.4 - Manual (Page 15)

Owner’s Manual
15
SETTING THE GAIN
After completing the installation, follow these steps to set the Gain Control and then
perform the Final System Checks.
1. Turn the Gain Control all the way counter-clockwise.
2. Select the proper input voltage as described on page 7, (Gain Control with
Selectable Input Voltage)
3. Turn the vehicle’s Ignition Switch to the ON position. Then turn the ON/OFF
Switch on the source unit to the ON position. Set all Tone or Equalization Controls
to “flat” positions and turn Loudness off.
4. Play a CD or Tape and set the Volume Control at 75% of full level.
NOTE: If the system uses an equalizer set all frequency controls to the “flat”
position.
5. Slowly increase the Gain Control. Stop when you hear a slight distortion of audio.
SETTING THE CROSSOVER
The Clarion amplifiers feature fully adjustable crossovers. To set the crossovers, fol-
low these steps:
1. Using the X-Over Mode Switch, select the desired mode: LP for Low Pass, HP for
High Pass or OFF for Full Range.
2. Using the Freq (Hz) Selection Control, select the desired frequency.
SETTING THE BASS BOOST
1. Initially set the Bass Boost control to its OFF position.
2. Listen to a variety of music styles (e.g., Rock, Rap, etc.) and switch the Bass Boost
control ON until a noticeable increase in low bass response is realized.
CAUTION: If you hear a “pop” (due to speaker over-excursion) adjust switch to
lower the Bass Boost to prevent speaker damage.
SETTING
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