Kenwood LZH 100W Manual

The Kenwood LZH 100W is a high-performance 100-watt audio amplifier with advanced digital signal processing, multiple input options, built-in cooling system, remote control capability, and professional-grade audio components. Designed for home audio enthusiasts and professional installations, it features thermal protection, overload circuitry, and versatile connectivity options. 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: High-power amplifier module, Digital Signal Processor, Cooling fan system, Remote control sensor, Multiple input/output terminals, Protection circuitry.

Feature	Description
Power Output	100W RMS per channel at 8 ohms
Input Connectors	RCA, XLR balanced inputs
Output Terminals	Binding posts for speaker connections
Cooling System	Variable speed fan with thermal monitoring
Protection Circuits	Overload, short-circuit, thermal protection
Remote Control	Infrared remote with volume and input selection
Power Switch	Front panel rocker switch with standby indicator
Input Selector	Multiple source selection (CD, AUX, TUNER)
Volume Control	Digital encoder with LED level display
Signal Indicators	Power, signal, protection status LEDs

Installation

Unpack and inspect contents. Place on stable, well-ventilated surface.

Position amplifier: Ensure adequate ventilation space around unit (minimum 10cm clearance).
Connect speakers: Use appropriate gauge speaker wire to binding posts.
Connect audio sources: Use RCA or XLR cables from source components.
Connect power: Use included power cord to AC outlet.
Ground connection: Ensure proper grounding for safety and performance.

WARNING! Amplifier generates heat during operation; ensure proper ventilation. Use correct speaker impedance matching.

First-Time Setup

Power on amplifier; observe startup sequence.

Power connection: Connect to appropriate AC voltage (check local requirements).
Source selection: Use INPUT selector to choose desired audio source.
Volume adjustment: Start with volume at minimum, gradually increase to desired level.
Speaker configuration: Verify proper speaker connections and polarity.
Remote setup: Point remote control at front panel sensor.

CAUTION! Always power off when making connections. Check all connections before powering on.

Specifications

Power Output: 100W RMS per channel (8 ohms, 20Hz-20kHz)
Total Harmonic Distortion: <0.05% at rated power
Frequency Response: 10Hz - 50kHz (+0/-3dB)
Signal-to-Noise Ratio: >100dB (A-weighted)
Input Sensitivity: 200mV for rated output
Input Impedance: 47k ohms
Damping Factor: >200 at 8 ohms
Power Requirements: 120V/230V AC, 50/60Hz
Dimensions: 430mm (W) x 150mm (H) x 380mm (D)
Weight: 12.5 kg

Controls and Settings

Front Panel: POWER switch, INPUT selector, VOLUME control, STATUS indicators.

Remote Control: POWER, INPUT selection, VOLUME up/down, MUTE, STANDBY.

Input Selection: CD, AUX, TUNER, LINE 1, LINE 2. Volume: Digital control with 0.5dB steps. Display: LED indicators for power, signal presence, protection status. Setup: No user-adjustable internal settings required.

Connecting Devices

Audio Inputs: RCA unbalanced and XLR balanced inputs. Speaker Outputs: Binding posts for 2-16 ohm speakers.

Turn off amplifier before making connections.
Connect audio sources using quality shielded cables.
Connect speakers observing correct polarity (+/- terminals).
Ensure all connections are secure and tight.
Select appropriate input source via front panel or remote.

Tip: Use high-quality speaker cable for best performance. Keep signal cables away from power cables.

Operation Modes

Supports stereo and bridged mono operation.

Stereo Mode: Normal two-channel operation.
Input Selection: Choose between multiple audio sources.
Volume Control: Digital control with precise adjustment.
Mute Function: Temporary audio muting without volume change.
Standby Mode: Low-power consumption when not in use.

WARNING! Do not operate without proper load. Avoid short-circuiting speaker outputs.

Protection Features

Thermal Protection: Automatic shutdown if overheating detected. Overload Protection: Current limiting for short-circuit protection. DC Protection: Prevents DC voltage from reaching speakers.

Care & Maintenance

Unplug before cleaning. Use soft, dry cloth for exterior cleaning. Keep ventilation openings clear of dust.

CAUTION! Do not use liquid cleaners or aerosols. Do not block ventilation openings.

Regulatory Information

CE compliant: Meets European safety and EMC standards. RoHS compliant: Free of hazardous substances. FCC Part 15: Class B digital device compliance. Copyright © 2006 Kenwood Corporation; all rights reserved. For support, visit www.kenwood.com or contact authorized service centers.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power	Power cord/outlet	Check power cord connection; verify outlet function; check fuse.
No sound	Connections/volume	Verify input selection; check source device; adjust volume; check mute status.
Distorted sound	Overload/speakers	Reduce volume; check speaker impedance; verify source quality.
Protection mode active	Overheating/short circuit	Allow unit to cool; check speaker wires for shorts; reduce volume.
Remote not working	Batteries/obstacles	Replace batteries; ensure clear line of sight to sensor; check remote operation.

Reset: Power cycle unit if protection mode activates.

Service: Contact authorized Kenwood service center; www.kenwood.com