Marantz SR225 Manual

The Marantz SR225 is a high-performance stereo receiver featuring 50 watts per channel, multiple audio inputs, phono input for turntables, AM/FM tuner with preset stations, tone controls, headphone output, and remote control operation. Designed for audiophile-quality sound reproduction with classic Marantz styling and build quality. Below are key sections for setup, operation, features, and troubleshooting.

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

Features at a Glance

Key components: Stereo amplifier section, AM/FM tuner, multiple input selection, phono stage, tone controls, headphone output.

Feature	Description
Power Output	50 watts per channel (8 ohms)
Inputs	Phono, CD, Tuner, Aux, Tape
Tuner	AM/FM with 30 station presets
Tone Controls	Bass and treble adjustment
Headphone Jack	For private listening
Remote Control	Full function remote included
Speaker Terminals	Standard binding posts
Loudness Control	Enhanced bass at low volumes
Power Switch	Main power on/off
Volume Control	Motorized volume knob

Installation

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

Connect speakers: Use speaker wire to connect left and right speakers to corresponding terminals.
Connect audio sources: Use RCA cables to connect CD player, turntable, tape deck, etc.
Connect antenna: Attach AM loop antenna and FM wire antenna to rear terminals.
Plug into AC power outlet.

WARNING! Ensure proper ventilation around receiver. Do not block ventilation openings.

First-Time Setup

Power on receiver; initialize settings.

Set input source: Rotate input selector to desired source (Phono, CD, Tuner, etc.).
Tuner setup: Press TUNER button, tune to desired station, press MEMORY to store presets.
Adjust volume: Start with low volume and gradually increase to desired level.
Tone controls: Set bass and treble to flat position initially.

CAUTION! Ensure proper speaker impedance matching. Use speakers rated 8 ohms or higher.

Specifications

Power Output: 50 watts per channel (8 ohms, 20Hz-20kHz)
Total Harmonic Distortion: 0.08%
Frequency Response: 10Hz-50kHz
Input Sensitivity: Phono: 2.5mV, Line: 150mV
Signal-to-Noise Ratio: Phono: 80dB, Line: 100dB
Tuner Section: FM stereo, AM tuner
Preset Stations: 30 (20 FM, 10 AM)
Power Requirements: 120V AC, 60Hz
Dimensions: 17.1" W × 5.1" H × 13.8" D
Weight: 18.7 lbs

Controls and Settings

Front Panel: Power switch, input selector, volume control, tone controls, headphone jack, tuning knob.

Remote Control: Power, input selection, volume up/down, mute, tuner controls, numeric keys for presets.

Input Selection: Phono, CD, Tuner, Aux, Tape. Tone Controls: Bass ±10dB, Treble ±10dB. Tuner: Manual tuning, auto scan, preset memory. Loudness: On/Off switch for bass enhancement at low volumes.

Connecting Devices

Audio Sources: Phono for turntables, CD for CD players, Aux for additional sources, Tape for recording.

Turn off receiver before connecting devices.
Use quality RCA cables for audio connections.
Phono input: Connect turntable with ground wire to prevent hum.
Tape connections: Connect both playback and record jacks for tape monitoring.

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

Tuner Operation

AM/FM tuner with manual and automatic tuning modes.

Select Tuner input: Press TUNER button on front panel or remote.
Manual tuning: Use TUNE buttons or tuning knob to find stations.
Auto scan: Press and hold TUNE to scan for next strong station.
Store presets: Tune to desired station, press MEMORY, then numeric key (1-30).
Recall presets: Press corresponding numeric key for stored station.
FM stereo: Automatic stereo/mono switching; stereo indicator lights when receiving stereo signal.

WARNING! Ensure proper antenna connection for best reception quality.

Audio Settings

Tone Controls: Adjust bass and treble to suit listening preferences and room acoustics. Loudness Control: Engages bass and treble boost at low volume levels for fuller sound. Balance Control: Adjusts left/right speaker balance. Headphone Output: Automatically mutes speakers when headphones are connected.

Care & Maintenance

Unplug before cleaning. Use soft, dry cloth for exterior cleaning. Avoid chemical cleaners. Keep unit free from dust and moisture.

CAUTION! Do not use liquid cleaners. 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. All rights reserved. For support, visit www.marantz.com or contact customer service at 1-800-270-2873.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No sound from speakers	Volume/mute/speaker connections	Check volume setting; ensure mute is off; verify speaker connections.
Hum or noise	Grounding/cable issues	Check turntable ground connection; ensure cables are secure; separate audio and power cables.
Poor FM reception	Antenna placement	Reposition FM antenna; ensure proper connection; try different antenna location.
Remote not working	Batteries/obstructions	Replace batteries; ensure clear line of sight to IR sensor; check battery orientation.
One channel not working	Balance/cable/speaker	Check balance control; verify cable connections; test speaker on other channel.

Reset: Unplug unit for 30 seconds to reset microprocessor.

Service: 1-800-270-2873; www.marantz.com