Kenwood A85 User Manual

The Kenwood A85 is a high-performance stereo amplifier featuring advanced audio processing, multiple input options, precision tone controls, and robust power output. Designed for audiophiles, it offers exceptional sound quality with support for various audio sources including CD players, turntables, and digital media. Below are key sections covering features, installation, operation, specifications, and maintenance.

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

Features at a Glance

Key components: High-power amplifier section, multiple input selector, tone controls, headphone output, remote control capability.

Feature	Description
Power Output	85 watts per channel into 8 ohms
Input Selector	Multiple source selection (CD, AUX, PHONO, TUNER)
Tone Controls	Bass and treble adjustment with bypass option
Headphone Jack	6.35mm stereo headphone output
AC Power Input	Standard IEC power connector
Speaker Terminals	High-quality binding posts
Remote Control	Infrared remote for basic functions
Power Switch	Main power on/off with standby mode
Volume Control	Precision analog potentiometer
Balance Control	Left/right channel balance adjustment

Installation

Unpack and inspect all components. Place on stable, level surface with adequate ventilation.

Connect speakers: Use high-quality speaker cable to binding posts, observing polarity.
Connect audio sources: Use appropriate cables for CD player, turntable, or other sources.
Connect power: Use supplied power cord to AC outlet.
Position for ventilation: Ensure minimum 10cm clearance on all sides.

WARNING! Heavy component; lift with care. Ensure proper ventilation to prevent overheating.

First-Time Setup

Power on amplifier; verify all connections are secure.

Source selection: Rotate input selector to desired source (CD, PHONO, etc.).
Volume adjustment: Start with volume at minimum, gradually increase to desired level.
Tone settings: Set bass and treble to neutral position for initial listening.
Balance check: Adjust balance control for centered stereo image.

CAUTION! Always turn volume to minimum before powering on or changing sources.

Specifications

Power Output: 85W + 85W (8 ohms, 20Hz-20kHz)
Total Harmonic Distortion: 0.08% (1kHz, rated power)
Frequency Response: 10Hz - 100kHz (+0/-3dB)
Input Sensitivity: 200mV (AUX), 2.5mV (PHONO)
Signal-to-Noise Ratio: 100dB (AUX), 80dB (PHONO)
Inputs: PHONO, CD, TUNER, AUX
Outputs: Speaker terminals, headphone jack
Power Requirements: 120V AC, 60Hz, 250W max
Dimensions: 440mm (W) x 150mm (H) x 380mm (D)
Weight: 12.5kg

Controls and Settings

Front panel controls: POWER, INPUT SELECTOR, VOLUME, BASS, TREBLE, BALANCE, HEADPHONE JACK.

Remote Functions: POWER, VOLUME UP/DOWN, MUTE, INPUT SELECTION.

Tone Controls: Bass ±10dB at 100Hz, Treble ±10dB at 10kHz. Input Selection: PHONO (MM cartridge), CD, TUNER, AUX. Special Features: Direct mode for pure signal path, tone defeat switch, speaker A/B selection.

Connecting Audio Sources

PHONO input: For turntable with magnetic cartridge. CD input: For CD player or similar line-level source. AUX input: For additional audio sources.

Turn off amplifier before making connections.
Use high-quality interconnects with proper shielding.
Match cable connectors to appropriate inputs.
Ensure secure connections to prevent signal loss.

Tip: Keep audio cables away from power cords to minimize interference.

Operation Guide

Basic operation procedures for optimal performance.

Power sequence: Turn on source components first, then amplifier.
Volume control: Start low, increase gradually to prevent speaker damage.
Input selection: Choose correct input for connected source.
Tone adjustment: Use tone controls to suit listening environment and preferences.
Headphone use: Insert headphones to automatically mute speaker outputs.
Shutdown: Turn volume to minimum before powering off.

WARNING! Avoid operating at maximum volume for extended periods.

Advanced Features

Direct Mode: Bypasses tone controls for pure signal path. Speaker Select: Choose between speaker sets A or B. Remote Sensor: Front-panel IR receiver for remote operation.

Care & Maintenance

Unplug from power before cleaning. Use soft, dry cloth for exterior. Clean controls with contact cleaner if necessary.

CAUTION! Do not use liquid cleaners or sprays. Keep away from moisture and extreme temperatures.

Regulatory Information

FCC Part 15: Class B digital device compliant. CE marked for European safety standards. Copyright © Kenwood Corporation. All trademarks property of their respective owners. For technical support, visit www.kenwood.com or contact authorized service centers.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No sound from speakers	Volume control/connections	Check volume setting; verify speaker connections; ensure input selected.
Distorted sound	Overload/source issue	Reduce volume; check source component; verify proper connections.
Hum or noise	Grounding/cable issues	Check ground connections; separate audio and power cables; use shielded cables.
Remote not working	Batteries/obstructions	Replace batteries; ensure clear path to IR sensor; check remote mode.
One channel silent	Balance setting/cable	Adjust balance control; check interconnects; swap channels to isolate issue.

Reset: Power cycle amplifier if unusual behavior occurs.

Service: Contact authorized Kenwood service center for repairs.