Marantz SR18 U1B Manual

The Marantz SR18 U1B is a high-performance AV receiver featuring Dolby Digital and DTS decoding, 7-channel amplification, THX Ultra certification, advanced video switching, multi-room audio capabilities, and comprehensive 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. Audio Setup 8. Multi-Room Operation 9. Care & Maintenance 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: 7-channel amplifier, THX Ultra certification, Dolby Digital/DTS decoding, multi-room audio, comprehensive input/output connections.

Feature	Description
Power Output	110W x 7 channels (8 ohms, 20Hz-20kHz)
Audio Decoding	Dolby Digital, DTS, Dolby Pro Logic II
THX Certification	THX Ultra for home theater performance
Video Inputs	Composite, S-Video, Component video
Audio Inputs	Analog, coaxial digital, optical digital
Multi-Room	Zone 2 and Zone 3 audio output
Remote Control	Learning remote with backlight
Setup Assistant	Automatic speaker calibration
Bass Management	Adjustable crossover frequencies
Display	Fluorescent display with dimmer control

Installation

Unpack and inspect contents. Ensure proper ventilation around unit.

Position unit: Place on stable surface with adequate ventilation space.
Connect speakers: Use appropriate gauge speaker wire for each channel.
Connect source devices: Use appropriate audio/video cables for each source.
Connect video display: Use component video or composite/S-video output.
Plug into AC power: Use dedicated power outlet.

WARNING! Ensure proper ventilation to prevent overheating. Unit generates heat during operation.

First-Time Setup

Power on receiver; follow on-screen setup assistant.

Speaker configuration: Set speaker sizes and distances.
Input assignment: Assign sources to specific input buttons.
Audio calibration: Use built-in test tones for level matching.
Video setup: Configure video output resolution and format.
Multi-room setup: Configure Zone 2 and Zone 3 if used.

CAUTION! Disconnect power before making any cable connections.

Specifications

Power Output: 110W x 7 channels (8 ohms, 20Hz-20kHz)
Total Harmonic Distortion: 0.05% (20Hz-20kHz)
Frequency Response: 10Hz-100kHz (+1/-3dB)
Signal-to-Noise Ratio: 100dB (line level)
Digital Inputs: 4 optical, 3 coaxial
Analog Inputs: 6 stereo pairs
Video Inputs: 4 composite, 4 S-video, 3 component
Speaker Terminals: 7-channel binding posts
Power Consumption: 650W maximum
Dimensions: 17.3" W x 7.6" H x 17.7" D
Weight: 45.4 lbs

Controls and Settings

Front panel: POWER, INPUT SELECT, VOLUME, TONE, MUTE, DISPLAY. Remote: Complete control of all functions with learning capability.

Main Settings: Speaker configuration, crossover settings, input assignment, video setup, audio processing modes. Tone controls: Bass, treble, balance. Audio modes: Dolby Digital, DTS, stereo, direct, pure direct. Video: Output resolution, aspect ratio control.

Connecting Devices

Comprehensive connectivity for audio and video sources.

Audio sources: CD player, turntable (with phono preamp), tape deck, tuner.
Video sources: DVD player, cable/satellite box, gaming console, VCR.
Digital connections: Use optical or coaxial for best audio quality.
Speaker connections: Ensure proper polarity and secure connections.

Tip: Use high-quality cables for best performance, especially for digital connections.

Audio Setup

Advanced audio configuration for optimal sound quality.

Speaker calibration: Use built-in test tones and SPL meter.
Crossover settings: Set appropriate frequencies for each speaker.
Delay settings: Input speaker distances for proper timing.
EQ settings: Adjust tone controls to room acoustics.
Surround modes: Select appropriate decoding for source material.

Note: THX mode requires proper speaker placement and calibration.

Multi-Room Operation

Zone 2 and Zone 3 audio distribution capabilities.

Zone 2: Independent audio source selection and volume control.
Zone 3: Additional audio zone with source selection.
Remote sensors: IR input for remote control in other rooms.
Power amplification: Additional amplifiers may be required for multiple zones.

Care & Maintenance

Unplug before cleaning. Use soft, dry cloth for exterior surfaces.

CAUTION! Do not use liquid cleaners or aerosols. Keep ventilation openings clear of obstructions.

Regulatory Information

FCC Part 15: Class B digital device; complies with interference limits for residential use. Copyright © Marantz America, Inc. THX is a registered trademark of Lucasfilm Ltd. Dolby and DTS are registered trademarks. For support, visit www.marantz.com or contact authorized service centers.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power	Power cord, circuit breaker	Check power connection; verify outlet function; check circuit breaker.
No sound	Speaker connections, input selection	Verify speaker wires; check input selection; ensure source is active.
No video	Cable connections, input selection	Check video cables; verify input/output selection; test source device.
Remote not working	Batteries, IR path	Replace batteries; ensure clear path to IR sensor; check remote mode.
Overheating	Ventilation, load impedance	Ensure adequate ventilation; check speaker impedance; reduce volume.
Hum or noise	Ground loops, cable quality	Check ground connections; use quality cables; separate power and audio cables.

Reset: Press and hold TONE and SURROUND MODE while powering on for factory reset.

Service: Contact authorized Marantz service center; www.marantz.com