Clarion APX480M Owner'S Manual Download Page 13

Operation/Installation Manual

11

FINAL SYSTEM CHECK

1. Start the engine and turn on the source unit. 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 also
refer to Troubleshooting.  Depending on your system design, the levels may
become quite loud even at low Volume Control settings. Until you get an
“audio feel” of the system’s power, use care when adjusting controls.    

2. 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).

3. Increase the volume and verify that the amplifier reproduces audio (at full
frequencies) without distortion.  If you hear distortion, check the connections
and verify that the Gain Control is set correctly. Another possibility is 
damaged speakers or under-powered speakers. Once again refer to
Troubleshooting for additional help.

Problem

No Audio.

Solution

Low or no remote turn-on voltage.  Check remote connections at amplifier and

source unit.

Blown amplifier fuse.  Replace with new fast-blow fuse (same rating).

Power wires not connected.  Check battery and ground wiring at amplifier; also

check battery connections.

Speaker leads shorted.  Check speaker continuity to ground, it should not show a

common ground.

Speakers not connected or are blown.  Check speaker connections at amplifier,

measure coil impedance.

TROUBLESHOOTING

Problem

Audio cycles on and off.

Solution

Thermal protection circuits are shutting amplifier off. Check location for adequate
ventilation; consult an authorized Clarion Audio Dealer.

Problem

Distorted audio.

Solution

Gain is not set properly, or damaged speaker cones.  Review Setting Gain; inspect
each speaker cone for signs of damage (i.e. frozen cone, burning smell, etc.) 

APX480M manual.qxd  3/12/2004  1:07 PM  Page 13

Summary of Contents for APX480M

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Page 2: ...rtion 2 ohm stereo stable 4 ohm mono stable Gold plated power speaker and RCA connectors Speaker level input Low profile construction with aluminum heat sink for efficient heat dissipation ABOUT THE MANUAL AND WARRANTY This manual describes the basic requirements to install the Clarion APX480M amplifier The installation of this amplifier can be quite complex to install if you do not posses the nec...

Page 3: ...his amplifier is the ability to create a 2 3 or 4 channel amplified system with a flip of a switch see Application section In the event of component failure or a short circuit the APX480M incorporates safe guards and an outboard ATC fuse to prevent damage to the amplifier INPUT CONNECTIONS AND AUDIO CONTROLs The front panel of the APX480M contains both connections for RCA and speaker level inputs ...

Page 4: ... crossover points Use this feature along with your speaker manufacturer s recommended crossover frequencies to quickly design a more advanced system see Applications on page 6 NOTE If either of the X Over Mode Switches is set to OFF varying the Freq Hz Control will pro duce no effect Rear X Over Frequency Multiplier Switch When engaged this switch increases the crossover frequency of the rear chan...

Page 5: ...ire must be grounded at the Radio Failure to do this will result in noise and improper operation CONNECTIONS FOR POWER AND SPEAKERS The rear panel of the APX480M contains power and speaker connections as shown below 1 Left Front Speaker Output 2 Right Front Speaker Output 3 Remote Turn on Input 4 Ground Input 5 Battery 12v Input 6 40 Amp Fuse 7 Left Rear Speaker Output 8 Right Rear Speaker Output ...

Page 6: ... sure the proposed mounting holes will not cut into the fuel tank fuel lines electrical wiring or through the boat 4 Do not mount the amplifier where it is susceptible to water WIRING PRECAUTIONS Read all of the wiring precautions prior to making any connections If you are unsure and or don t have the necessary installation hardware contact your local Clarion dealer to perform the installation 1 B...

Page 7: ...t circuit 8 Extra cable can cause signal loss and act as an antenna for noise Use only high quality RCA cords that are no longer than necessary 9 In multiple amplifier systems it is recommended to use a relay on the remote turn on lead of the radio WIRING AND APPLICATIONS The Clarion APX480M 4 channel marine amplifier can be used in a variety of system applications Here are some examples to help p...

Page 8: ...s 4 channel system the APX480M drives a pair of stereo satellites for the front and a pair of subwoofers for the rear Note the filter settings 4 Channel Stereo System 2 Channel High Pass 2 Channel Low Pass APX480M manual qxd 3 12 2004 1 07 PM Page 8 ...

Page 9: ...ereo System with Low Pass Bridged Mono Channel Figure 6 The APX480M can also be used to drive a pair of stereo satellites for the front and a single mono subwoofer for the rear Note the filter settings APX480M manual qxd 3 12 2004 1 07 PM Page 9 ...

Page 10: ...Amplifier 8 2 Channel High Power System Satellite or Subwoofer Figure 7 The APX480M can be set up as a 2 channel high power amplifier to drive a pair of satellites or subwoofers APX480M manual qxd 3 12 2004 1 07 PM Page 10 ...

Page 11: ...ponent values to create a 6dB per octave crossover at specified frequencies Use components that have a 5 tolerance and capacitors rated at 100V NOTE Choose the same frequency for both LP and HP crossovers Do not overlap frequencies as this may damage the amplifier FREQ hz 80 100 125 150 200 L mH 8 0 6 4 5 1 4 2 3 2 C uF 497 398 318 265 199 NOTE Chart values based on 4 Ohm speakers APX480M manual q...

Page 12: ...ct 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 If the desired frequency exceeds the range of the Freq Hz Selection Control press the Crossover Frequency Multiplier Switch to increase the value by a multiplier of 10 For example 55Hz x 10 550Hz or 550Hz x 10 5 5kHz 3 Repeat steps 1 and 2 for both the front...

Page 13: ...ntrol is set correctly Another possibility is damaged speakers or under powered speakers Once again refer to Troubleshooting for additional help Problem No Audio Solution Low or no remote turn on voltage Check remote connections at amplifier and source unit Blown amplifier fuse Replace with new fast blow fuse same rating Power wires not connected Check battery and ground wiring at amplifier also c...

Page 14: ... amplifier install an in line noise filter on source unit s power wire check alternator and or voltage regulator test for weak battery or add water to battery Frequency Response Signal Noise Ratio THD Input Sensitivity Low Level Input Sensitivity Speaker Level Max Power Output Cont Power Output 2 Ohm Stereo Output Bridged Power Dimensions Current Consumption Max Power Output 20Hz 20kHz 95db 05 all...

Page 15: ...t be shipped in its original carton or equivalent carton fully insured with shipping charges prepaid Clarion will not assume any responsibility for any loss or damage incurred in shipping 7 CLARION PRODUCTS INCLUDING PROAUDIO PRODUCTS PURCHASED FROM A SOURCE OTHER THAN AN AUTHORIZED CLARION DEALER INCLUDING ANY AND ALL PURCHASES VIA THE INTERNET FROM A NON INTERNET AUTHORIZED CLARION DEALER SHALL ...

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