Setting The Crossover; Setting The Bass Boost; Final System Checks - Clarion APX4221 Manuel De L'utilisateur

apx2121_4241_1301.qxd

Setting the crossover

Clarion amplifiers feature fully-adjustable crossovers.
1. Using the X-Over mode switch, select either LP (low pass) or HP (high pass) or
OFF for full range.
2. Using the Freq (Hz) control, select the frequency.

Setting the bass boost

1. Initially set the bass boost control to off.
2. Listen to a variety of music styles (for example, rock, rap, etc.) and switch the bass
boost control on until you notice an increase in low bass response.
If you hear a pop caused by speaker overexertion, l ower the
bass boost to prevent damage to the speaker.
Final system check s
1. Start the engine and turn on the source unit.
2. After a two-second delay, slowly increase the volume control and listen to the
audio.
If you hear any noise, static, distortion or no sound at all, check the connections
and refer to Troubleshooting. Depending on your system, the volume may become
quite loud even at low level settings. Until you get an "audio feel" for the system's
power, use care when adjusting the controls.
3. Turn the balance controls to their extreme positions and listen to the results. Audio
output should match control settings (audio from the left speaker when balance is
left).
4. Increase the volume and verify that the amplifier reproduces the audio at full
frequencies without distortion.
If you hear distortion check the connections and verify that the gain control is set
correctly. Another cause of distortion could be underpowered or damaged
speakers. Refer to Troubleshooting.
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