Marantz SR 73 Owner's Manual

The Marantz SR 73 is a high-performance stereo receiver featuring Dolby Pro Logic surround sound, AM/FM tuner with 30 station presets, multiple audio inputs, remote control capability, and 100 watts per channel power output. Designed for audiophile-quality sound reproduction with gold-plated connectors, tone controls, and advanced signal processing. Below are key sections for setup, operation, features, and troubleshooting.

Features at a Glance

Key components: High-current power amplifier, Dolby Pro Logic decoder, AM/FM tuner, remote control, multiple audio inputs, speaker terminals.

Installation & Setup

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

1. Connect speakers: Use speaker wire to connect to A/B speaker terminals.
2. Connect audio sources: Use appropriate inputs (CD, Tape, Phono, Video/Aux).
3. Connect antenna: AM loop antenna and FM wire antenna.
4. Plug into AC power outlet.
5. Turn on power and set initial volume to minimum.

WARNING! Ensure proper ventilation; do not block ventilation openings. Use correct speaker impedance (6-16 ohms).

Front Panel Controls

Main power switch, input selector, volume control, tone controls, headphone jack.

Controls: POWER, INPUT SELECTOR (CD, Tape, Phono, Video/Aux, Tuner), VOLUME, BASS, TREBLE, BALANCE, SPEAKERS A/B, HEADPHONE JACK, TUNING KNOB.

Display: Input source indicator, station frequency, volume level, surround mode. Buttons: TUNER BAND (AM/FM), MEMORY, TUNING MODE (Manual/Auto), DOLBY PRO LOGIC, MUTE.

Rear Panel Connections

Gold-plated RCA jacks for all inputs and outputs.

1. Speaker terminals: A/B speaker outputs (red/black)
2. Audio inputs: CD, Tape, Phono, Video/Aux
3. Tape output: For recording
4. Antenna terminals: AM loop, FM 75 ohm
5. AC power cord

Tip: Use high-quality cables for best audio performance. Ensure phono input used only for turntable.

Remote Control Operation

Full-function remote controls main receiver functions.

1. Power: Turns receiver on/off
2. Input selection: CD, Tape, Phono, Video/Aux, Tuner
3. Volume control: Up/down buttons
4. Mute: Temporary audio mute
5. Tuner controls: Band selection, preset stations
6. Surround mode: Dolby Pro Logic on/off

Batteries: Install two AAA batteries. Point remote at receiver's front panel.

Audio Settings & Adjustments

Access tone controls and audio settings via front panel.

1. Bass control: Adjust low frequencies (-10dB to +10dB)
2. Treble control: Adjust high frequencies (-10dB to +10dB)
3. Balance: Adjust left/right channel balance
4. Loudness: Compensates for low-volume listening
5. Dolby Pro Logic: Surround sound processing
6. Speaker selection: A/B speakers on/off

Note: Set tone controls to flat (12 o'clock) for neutral sound.

Tuner Operation

AM/FM tuner with 30 station presets.

1. Select tuner input: Press TUNER on front panel or remote
2. Choose band: AM or FM
3. Tune stations: Manual tuning with knob or auto-scan
4. Store presets: Tune to station, press MEMORY, select preset number
5. Recall presets: Use numeric buttons or preset up/down

Tip: For best FM reception, extend FM antenna fully and position for strongest signal.

Specifications

• Power Output: 100W × 2 (8 ohms, 20Hz-20kHz)
• Total Harmonic Distortion: 0.08%
• Frequency Response: 10Hz-50kHz (+1/-3dB)
• Signal-to-Noise Ratio: 85dB (Phono), 100dB (Line)
• Input Sensitivity: Phono: 2.5mV, Line: 150mV
• Tuner Section: AM/FM, 30 presets
• Surround Processing: Dolby Pro Logic
• Power Consumption: 280W
• Dimensions: 17.3" × 6.3" × 15.4"
• Weight: 22 lbs

Care & Maintenance

Unplug before cleaning. Use soft, dry cloth only; avoid liquids.

CAUTION! Do not use abrasive cleaners. Keep away from moisture and extreme temperatures. Ensure proper ventilation.

Troubleshooting

Reset: Turn off power for 30 seconds, then restart.

Service: Contact authorized Marantz service center for repairs.