Kenwood KAC 7495 Manual

The Kenwood KAC 7495 is a high-performance car audio amplifier featuring MOSFET power supply, bridgeable 4/3/2 channel operation, variable low-pass/high-pass filters, bass boost, speaker level inputs, and thermal/overload/short circuit protection. With 4-ohm stable design and compact chassis, it delivers clean power for car audio systems. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

1. Features at a Glance 2. Installation 3. First-Time Setup 4. Specifications 5. Controls and Settings 6. Connecting Devices 7. Operation Modes 8. Protection Features 9. Care & Maintenance 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: MOSFET power supply, bridgeable channels, variable filters, bass boost, speaker level inputs.

Feature	Description
MOSFET power supply	Efficient and reliable power delivery
Bridgeable 4/3/2 channel	Flexible configuration options
Variable low-pass filter	Adjustable 50-200Hz for subwoofers
Variable high-pass filter	Adjustable 50-200Hz for speakers
Bass boost	0-18dB boost at 40Hz
Speaker level inputs	Connect directly to factory head units
Thermal protection	Automatic shutdown at high temperatures
Overload protection	Protects against electrical overloads
Short circuit protection	Protects speaker outputs
Compact chassis	Easy installation in tight spaces

Installation

Select proper mounting location and ensure adequate ventilation.

Disconnect negative battery terminal before installation.
Mount amplifier securely using provided hardware.
Connect power wire (12V) with appropriate fuse near battery.
Connect ground wire to clean, bare metal chassis point.
Connect remote turn-on wire from head unit.
Connect RCA inputs or speaker level inputs.
Connect speaker wires observing proper polarity.

WARNING! Ensure proper fuse rating and secure all connections to prevent electrical hazards.

First-Time Setup

Configure amplifier settings after installation.

Set input mode: LINE for RCA inputs, SPEAKER for high-level inputs.
Adjust input sensitivity: Start at minimum, increase until distortion.
Set filter type: HPF for speakers, LPF for subwoofers, OFF for full range.
Adjust filter frequency: 80Hz typical starting point.
Set bass boost: Use sparingly to avoid distortion.
Test all channels for proper operation.

CAUTION! Set gains properly to avoid speaker damage and ensure clean sound.

Specifications

RMS Power: 50W x 4 @ 4-ohm, 75W x 4 @ 2-ohm
Bridged Power: 150W x 2 @ 4-ohm
Frequency Response: 10Hz - 50kHz
Signal-to-Noise: >100dB
THD: <0.08%
Input Sensitivity: 200mV - 4V
Crossover: 12dB/octave slope
Bass Boost: 0-18dB @ 40Hz
Dimensions: Compact design for easy installation
Operating Voltage: 14.4V DC (11-16V range)

Controls and Settings

Front panel controls: Input mode switch, input level controls, filter switches, frequency controls, bass boost.

Input Section: MODE (LINE/SPEAKER), LEVEL controls for each channel. Crossover Section: HPF/LPF/OFF switches, FREQUENCY controls. Bass Boost: BOOST level control.

Proper settings: Start with levels at minimum, filters at 80Hz, bass boost off. Adjust gradually while listening for distortion.

Connecting Devices

Multiple connection options for various system configurations.

RCA inputs: Use with aftermarket head units for best quality.
Speaker level inputs: Connect to factory speaker wires when RCA outputs unavailable.
Power connections: 12V constant, ground, remote turn-on.
Speaker outputs: 4-channel standard or bridged modes.

Tip: Use high-quality wiring and secure all connections for optimal performance.

Operation Modes

Flexible operation for different system configurations.

4-channel mode: Standard operation for front/rear speakers.
3-channel mode: Front speakers + bridged subwoofer.
2-channel mode: Bridged operation for higher power.
Mono mode: All channels bridged for maximum subwoofer power.
Filter settings: HPF for speakers, LPF for subwoofers.
Bass boost: Enhance low frequencies when needed.

WARNING! Ensure impedance compatibility when bridging channels.

Protection Features

Multiple protection circuits ensure amplifier reliability.

Thermal Protection: Automatic shutdown if temperature exceeds safe limits. Overload Protection: Protects against electrical overloads. Short Circuit Protection: Speaker output protection. DC Offset Protection: Prevents DC voltage to speakers.

Care & Maintenance

Keep amplifier clean and ensure proper ventilation.

CAUTION! Do not block ventilation openings. Keep free of dust and moisture. Check connections periodically for corrosion.

Regulatory Information

FCC Part 15: Class B digital device; complies with interference limits. Copyright © Kenwood Corporation. All trademarks property of their respective owners. For support, visit www.kenwood.com or contact authorized service centers.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power	Power connections/fuse	Check 12V, ground, remote wires; verify fuse integrity.
No sound	Input connections/settings	Verify RCA/speaker inputs; check input mode setting.
Distorted sound	Gain settings/clipping	Reduce input level; check head unit volume.
Amplifier shuts off	Overheating/overload	Ensure proper ventilation; check impedance loads.
Protection light on	Short circuit/overload	Check speaker wires for shorts; verify impedance.

Reset: Disconnect power for 30 seconds to reset protection circuits.

Service: Contact authorized Kenwood service centers for repairs.