Kenwood Amp KAC 7205 Manual

The Kenwood KAC-7205 is a 2-channel car amplifier delivering high-quality audio performance with 500W max power output, MOSFET power supply, variable low-pass filter, bass boost, and speaker-level inputs. Designed for automotive audio systems, it features thermal, overload, and short circuit protection. 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 8. Protection Features 9. Care & Maintenance 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: MOSFET power supply, variable low-pass filter, bass boost control, speaker-level inputs, thermal protection circuitry.

Feature	Description
Power Output	500W max power (2-channel)
MOSFET Power Supply	Efficient power conversion
Low-Pass Filter	Variable 50-200Hz
Bass Boost	0-18dB at 40Hz
Speaker Level Inputs	For connection to factory head units
Protection Circuitry	Thermal, overload, and short circuit protection
Input Sensitivity	200mV-4V
Frequency Response	10-50,000Hz
Signal-to-Noise Ratio	>100dB
Dimensions	10-1/16" x 8-1/4" x 2-3/16"

Installation

Unpack and inspect contents. Choose suitable mounting location in vehicle.

Disconnect negative battery terminal before installation.
Mount amplifier: Secure to solid surface using provided hardware.
Connect power: Run 8-gauge power cable from battery to amplifier.
Connect ground: Use short 8-gauge cable to clean metal chassis point.
Connect remote turn-on: Wire to head unit remote turn-on lead.
Connect speakers: Use appropriate gauge speaker wire.
Connect audio inputs: Use RCA cables or speaker-level inputs.

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

First-Time Setup

After installation, reconnect battery and power on system.

Set input sensitivity: Adjust gain control for optimal performance.
Configure low-pass filter: Set frequency cutoff for subwoofers.
Adjust bass boost: Fine-tune low-frequency enhancement.
Test operation: Verify all channels working properly.
Finalize settings: Make final adjustments to suit listening preferences.

CAUTION! Set gain properly to avoid distortion and protect speakers.

Specifications

Channels: 2
Max Power: 500W
RMS Power: 150W x 2 @ 4Ω
THD: <0.08%
Frequency Response: 10-50,000Hz
Signal-to-Noise Ratio: >100dB
Input Sensitivity: 200mV-4V
Low-Pass Filter: 50-200Hz, 12dB/octave
Bass Boost: 0-18dB @ 40Hz
Operating Voltage: 14.4V DC (11-16V range)
Fuse Rating: 25A x 2

Controls and Settings

Access controls via front panel: POWER indicator, input level controls, filter settings.

Controls: Power indicator (green/red), Input level control, Low-pass filter frequency, Bass boost level, Input selector (RCA/Speaker level).

Input Level: Adjusts sensitivity from 200mV to 4V. Low-Pass Filter: Variable 50-200Hz cutoff. Bass Boost: 0-18dB enhancement at 40Hz. Input Selector: Choose between RCA or speaker-level inputs.

Connecting Devices

Power: Battery connection with appropriate fuse. Audio: RCA inputs or speaker-level inputs. Speakers: 2-channel output.

Disconnect battery before making connections.
Connect power cable: 8-gauge from battery positive to amplifier.
Connect ground: 8-gauge to clean chassis metal.
Connect remote: Wire to head unit remote turn-on.
Connect audio: RCA cables from head unit or speaker-level inputs.
Connect speakers: Proper polarity to speaker outputs.

Tip: Use quality cables and secure all connections properly.

Operation

Designed for continuous automotive audio operation.

Power on: System turns on with head unit.
Adjust volume: Use head unit volume control.
Fine-tune sound: Use amplifier controls for optimal performance.
Monitor operation: Check power and protection indicators.
Power off: System turns off with head unit or vehicle.

WARNING! Do not operate with cover removed. Ensure adequate ventilation.

Protection Features

Thermal Protection: Automatically reduces output if overheating detected. Overload Protection: Protects against excessive current draw. Short Circuit Protection: Safeguards against output shorts.

Care & Maintenance

Keep amplifier clean and dry. Ensure proper ventilation. Check connections periodically.

CAUTION! Do not expose to moisture or extreme temperatures. Clean with dry cloth only.

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/ground connections	Check power and ground connections; verify fuse condition.
No sound	Input/remote connections	Check RCA/speaker level inputs; verify remote turn-on wire.
Distorted sound	Gain settings/overload	Adjust input level; check for clipping; verify power supply.
Amplifier shuts off	Overheating/short circuit	Allow to cool; check for shorted speakers; ensure ventilation.
Protection light on	Fault condition	Check speaker connections; verify proper impedance; check for shorts.

Reset: Disconnect power and reconnect after 30 seconds.

Service: Contact authorized Kenwood service center for repairs.