Clarion XC6620

Questions and Answers:

L
Lauren ReynoldsAug 4, 2025
Why does my Clarion Amplifier audio stop playing?
- G
  Gregory AvilaAug 4, 2025
  Your Clarion Amplifier audio might stop playing due to several reasons. The thermal protection circuit may have shut down the amp to protect the circuitry, so ensure adequate ventilation around the amplifier. Also, the fuse at the battery or amplifier could be blown, so inspect and replace it if required. Finally, the amplifier might be loaded below 2 Ohms Stereo or 4 Ohms mono, so check the wiring and reconfigure as needed.
J
Joseph ChambersAug 8, 2025
What to do if my Clarion Amplifier shuts off at high volumes?
- Z
  zgilesAug 8, 2025
  If your Clarion Amplifier shuts off at high volumes, it may not be getting enough power from your vehicle's electrical system. Ensure that the voltage at the amplifier does not drop below 10V during operation. Clarion also recommends at least 4 AWG power wire for both +12V and GND connections.
A
alisonfranklinAug 13, 2025
Why does my Clarion Amplifier have distorted audio?
- A
  Amber MaloneAug 13, 2025
  Distorted audio from your Clarion Amplifier can be caused by a few things. The input gain might not be set properly, so adjust it according to the instructions. The source signal could also be distorted, so reduce the source output level. Lastly, the speaker might be damaged, so replace it if necessary.
K
Kathleen VillegasAug 17, 2025
What to do if my Clarion Amplifier fuse blows?
- N
  Nathan PatelAug 17, 2025
  If the fuse blows, the amplifier output may be shorted, so check all wiring. Alternatively, the amplifier may be damaged. Remove all speaker wires and check functionality. If the fuse blows with no speakers connected, send the amplifier to Clarion for repair.
M
martinkennethAug 21, 2025
How to reduce whining or ticking noise in my Clarion Amplifier?
- S
  Scott SullivanAug 21, 2025
  Whining or ticking noise in your Clarion Amplifier can often be reduced by addressing electrical noise issues. Here's what you can do: 1. Check for solid ground connections at the source unit and amplifier. 2. Run a ground wire from the amplifier to the source unit. 3. Reroute the interconnect cables away from sources of electrical noise, ensuring you are using good quality shielded interconnects. Also, reroute the speaker wire, or a passive crossover network, as needed, in case they are picking up electrical noise.
A
anthony08Aug 26, 2025
Why does my Clarion Amplifier have less bass than expected?
- J
  James HarrisAug 26, 2025
  If your Clarion Amplifier has less bass than expected, one speaker may be wired in reverse polarity; switch the + and - leads on one channel. Also, the crossover may be set too high; adjust it lower.
M
Melissa BradleyAug 30, 2025
How to troubleshoot Clarion Amplifier that will not turn on?
- H
  hbrewerAug 30, 2025
  To troubleshoot a Clarion Amplifier that will not turn on, start by using a digital multi-meter to check for 12V at the +12V and REM Connection. If the Auto Sensing circuit is being used, try reversing the + and - connections to the High Level RCA Adapters.

Clarion XC6620 Specifications

General

Brand	Clarion
Model	XC6620
Category	Amplifier
Language	English

Summary

ABOUT THE MANUAL AND WARRANTY

FEATURES

WARNING

XC6420 CONNECTIONS AND CONTROLS

Channel 1&2 Mode Select Switch

Selects the operating mode for channels 1 and 2 (e.g., Stereo, Mono, Bridged).

Channel 3&4 Mode Select Switch

Selects the operating mode for channels 3 and 4 (e.g., Stereo, Mono, Bridged).

Channel 1&2 Input Sensitivity Control (Gain)

Adjusts the input signal level for channels 1 and 2 to match the source unit.

Input Selection Switch

Determines how input signals are routed to the amplifier's channels.

Channel 3&4 Input Sensitivity Control (Gain)

Adjusts the input signal level for channels 3 and 4 to match the source unit.

Channel 1 Input RCA Connection

RCA input for channel 1 signal.

Channel 3 Input RCA Connection

RCA input for channel 3 signal.

Channel 1 Auto Sensing Control switch

Enables automatic turn-on when it detects an audio signal.

Channel 1&2 Bass Boost Level Control

Adjusts bass boost level for channels 1 and 2.

Channel 1&2 Crossover Frequency Control

Sets the cutoff frequency for the crossover on channels 1 and 2.

Channel 1&2 Crossover Function Switch

Selects the crossover type (HPF, LPF, Full Range) for channels 1 and 2.

Channel 3&4 Crossover Frequency Control

Sets the cutoff frequency for the crossover on channels 3 and 4.

Channel 3&4 Crossover Frequency Multiplier Control Switch

Multiplies the crossover frequency range for channels 3 and 4.

Channel 3&4 Crossover Function Switch

Selects the crossover type (HPF, LPF, Full Range) for channels 3 and 4.

Slot for remote level control wire

Connection point for the optional remote subwoofer level control.

Two 30 A Fuses

Main fuses for power protection.

+12 V Constant Power Source

Main power input connection.

Remote Turn-On Connection

Connection for the remote turn-on lead from the head unit.

Ground Connection

Main ground connection point for the amplifier.

Channel 2 Input RCA Connection

RCA input for channel 2 signal.

Channel 4 Input RCA Connection

RCA input for channel 4 signal.

Channel 1&2 Speaker Connections

Speaker output terminals for channels 1 and 2.

Channel 3&4 Speaker Connections

Speaker output terminals for channels 3 and 4.

XC6620 CONNECTIONS AND CONTROLS

Input Selection Switch

Determines how input signals are routed to the amplifier's channels.

Channel 1 Auto Sensing Control switch

Enables automatic turn-on when it detects an audio signal.

Channel 5&6 Bass Boost Control Switch

Adjusts bass boost level for channels 5 and 6.

Channel 1 Input RCA Connection

RCA input for channel 1 signal.

Channel 3 Input RCA Connection

RCA input for channel 3 signal.

Channel 5 Input RCA Connection

RCA input for channel 5 signal.

Channel 1&2 Crossover Frequency Control

Sets the cutoff frequency for the crossover on channels 1 and 2.

Channel 1&2 Crossover Function Switch

Selects the crossover type (HPF, LPF, Full Range) for channels 1 and 2.

Channel 1&2 Input Sensitivity Control (Gain)

Adjusts the input signal level for channels 1 and 2 to match the source unit.

Channel 3&4 Crossover Frequency Control

Sets the cutoff frequency for the crossover on channels 3 and 4.

Channel 3&4 Crossover Function Switch

Selects the crossover type (HPF, LPF, Full Range) for channels 3 and 4.

Channel 3&4 Input Sensitivity Control (Gain)

Adjusts the input signal level for channels 3 and 4 to match the source unit.

Channel 5&6 Crossover Frequency Control

Sets the cutoff frequency for the crossover on channels 5 and 6.

Channel 5&6 Crossover Function Switch

Selects the crossover type (HPF, LPF, Full Range) for channels 5 and 6.

Channel 5&6 Input Sensitivity Control (Gain)

Adjusts the input signal level for channels 5 and 6 to match the source unit.

Slot for remote level control wire

Connection point for the optional remote subwoofer level control.

Two 35 A Fuses

Main fuses for power protection.

+12 V Constant Power Source

Main power input connection.

Remote Turn-On Connection

Connection for the remote turn-on lead from the head unit.

Ground Connection

Main ground connection point for the amplifier.

Channel 2 Input RCA Connection

RCA input for channel 2 signal.

Channel 4 Input RCA Connection

RCA input for channel 4 signal.

Channel 6 Input RCA Connection

RCA input for channel 6 signal.

Channel 1&2 Speaker Connections

Speaker output terminals for channels 1 and 2.

Channel 3&4 Speaker Connections

Speaker output terminals for channels 3 and 4.

Channel 5&6 Speaker Connections

Speaker output terminals for channels 5 and 6.

INSTALLATION PLANNING AND CONSIDERATIONS

General Function Explanation

Sensitivity Control (Gain)

Adjusts amplifier sensitivity for optimal performance and to minimize noise and distortion.

Procedure (Oscilloscope) Method

Step-by-step guide for setting amplifier gain using an oscilloscope.

SMD DD-1 Method

Instructions for setting amplifier gain using the SMD DD-1 distortion detector.

General Function Explanation Cont

Auto Sensing Control Switch

Enables automatic turn-on without REM terminal connection.

Bass Boost Level Control

Adds up to 12dB boost at 45Hz to enhance bass impact.

Crossover Function Switch

Selects the crossover mode (high-pass, low-pass, or off) for speaker protection.

Crossover Frequency Control

Adjusts the -3dB crossover frequency from 50Hz to 500Hz (or 500-5000Hz with multiplier).

Remote Turn-On Connection

Activates the amplifier when +12V is applied to this terminal.

Speaker Connections

Details on connecting speakers for stereo and bridged modes, including impedance requirements.

Input RCA Connections

Instructions for connecting RCA pre-amp outputs or using adapters for speaker-level inputs.

Speaker Wiring Diagrams

4 Ohm Stereo (XC6420 or XC6620)

Wiring diagram for connecting four 4-ohm speakers in stereo mode.

2 Ohm Stereo (XC6420 or XC6620)

Wiring diagram for connecting four 2-ohm speakers in stereo mode.

Speaker Wiring Diagrams Cont

4 Ohm Mono - One 4 Ohm Single Voice Coil Subwoofer

Wiring diagram for a single 4-ohm subwoofer in mono bridged mode.

4 Ohm Mono - One Dual 2 Ohm Voice Coil Subwoofer

Wiring diagram for a dual 2-ohm voice coil subwoofer in mono bridged mode.

Speaker Wiring Diagrams Cont

4 Ohm Mono - Two Dual 4 Ohm Voice Coil Subwoofers

Wiring diagram for two dual 2-ohm voice coil subwoofers in mono bridged mode.

Signal Distribution

Signal Distribution Cont

XC6420 Input Selection Switch

Describes XC6420 input routing for 4 Channel, 2 Channel, and 2 Channel Bass Boost modes.

XC6420 Mode Select Switch

Explains Stereo, Mono, and Bridged modes for XC6420 channel pairs.

XC6620 Input Selection Switch

Details input routing for XC6620 in 6 Channel, 4 Channel, and 2 Channel modes.

XC6420 Signal Distribution Flow Chart

XC6620 Signal Distribution Flow Chart

Power Connections

Wiring Precautions

Installation

Subwoofer Level Control Installation

TROUBLESHOOTING

Specifications

XC6420

Technical specifications for the XC6420 amplifier, including power output and frequency response.

Specifications

XC6620

Technical specifications for the XC6620 amplifier, including power output and frequency response.

Related product manuals

2/1 Channel Power Amplifier DPX1000.2

16 pages

Table of Contents

Questions and Answers:

Clarion XC6620 Specifications

Summary

ABOUT THE MANUAL AND WARRANTY

FEATURES

WARNING

XC6420 CONNECTIONS AND CONTROLS

Channel 1&2 Mode Select Switch

Channel 3&4 Mode Select Switch

Channel 1&2 Input Sensitivity Control (Gain)

Input Selection Switch

Channel 3&4 Input Sensitivity Control (Gain)

Channel 1 Input RCA Connection

Channel 3 Input RCA Connection

Channel 1 Auto Sensing Control switch

Channel 1&2 Bass Boost Level Control

Channel 1&2 Crossover Frequency Control

Channel 1&2 Crossover Function Switch

Channel 3&4 Crossover Frequency Control

Channel 3&4 Crossover Frequency Multiplier Control Switch

Channel 3&4 Crossover Function Switch

Slot for remote level control wire

Two 30 A Fuses

+12 V Constant Power Source

Remote Turn-On Connection

Ground Connection

Channel 2 Input RCA Connection

Channel 4 Input RCA Connection

Channel 1&2 Speaker Connections

Channel 3&4 Speaker Connections

XC6620 CONNECTIONS AND CONTROLS

Input Selection Switch

Channel 1 Auto Sensing Control switch

Channel 5&6 Bass Boost Control Switch

Channel 1 Input RCA Connection

Channel 3 Input RCA Connection

Channel 5 Input RCA Connection

Channel 1&2 Crossover Frequency Control

Channel 1&2 Crossover Function Switch

Channel 1&2 Input Sensitivity Control (Gain)

Channel 3&4 Crossover Frequency Control

Channel 3&4 Crossover Function Switch

Channel 3&4 Input Sensitivity Control (Gain)

Channel 5&6 Crossover Frequency Control

Channel 5&6 Crossover Function Switch

Channel 5&6 Input Sensitivity Control (Gain)

Slot for remote level control wire

Two 35 A Fuses

+12 V Constant Power Source

Remote Turn-On Connection

Ground Connection

Channel 2 Input RCA Connection

Channel 4 Input RCA Connection

Channel 6 Input RCA Connection

Channel 1&2 Speaker Connections

Channel 3&4 Speaker Connections

Channel 5&6 Speaker Connections

INSTALLATION PLANNING AND CONSIDERATIONS

General Function Explanation

Sensitivity Control (Gain)

Procedure (Oscilloscope) Method

SMD DD-1 Method

General Function Explanation Cont

Auto Sensing Control Switch

Bass Boost Level Control

Crossover Function Switch

Crossover Frequency Control

Remote Turn-On Connection

Speaker Connections

Input RCA Connections

Speaker Wiring Diagrams

4 Ohm Stereo (XC6420 or XC6620)

2 Ohm Stereo (XC6420 or XC6620)

Speaker Wiring Diagrams Cont

4 Ohm Mono - One 4 Ohm Single Voice Coil Subwoofer

4 Ohm Mono - One Dual 2 Ohm Voice Coil Subwoofer

Speaker Wiring Diagrams Cont

4 Ohm Mono - Two Dual 4 Ohm Voice Coil Subwoofers