Marantz 4415 Manual

The Marantz 4415 is a classic stereo receiver featuring 15 watts per channel RMS power output, AM/FM tuner with quartz PLL synthesizer tuning, phono input for turntables, tape monitor circuits, loudness control, and comprehensive audio controls. Below are key sections for features, installation, operation, specifications, and troubleshooting.

Features at a Glance

Key components: Stereo amplifier section, AM/FM tuner, Phono input, Tape monitor circuits, Front panel controls, Speaker outputs.

Feature	Description
Power Output	15 watts per channel RMS (8 ohms)
Tuner Section	AM/FM with quartz PLL synthesizer
Phono Input	For magnetic cartridge turntables
Tape Monitor	Two tape decks with dubbing capability
Loudness Control	Compensates for low volume listening
Tone Controls	Bass and treble adjustment
Speaker Selector	A/B speaker switching
Headphone Jack	For private listening
Power Switch	Main power on/off
Volume Control	Master volume adjustment

Installation

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

1. Connect speakers: Use speaker wire to connect to A or B speaker terminals.
2. Connect turntable: Use phono input for magnetic cartridge turntables.
3. Connect tape decks: Use tape 1 and tape 2 inputs/outputs.
4. Connect auxiliary sources: Use AUX input for CD players, etc.
5. Plug into AC power outlet.

WARNING! Ensure proper ventilation; do not block heat sinks. Use correct speaker impedance.

First-Time Setup

Power on receiver; set initial controls.

1. Set volume to minimum before power on.
2. Select input source: PHONO, TUNER, AUX, or TAPE.
3. Tune FM stations: Use tuning knob and stereo indicator.
4. Adjust tone controls: Set bass and treble to flat position.
5. Test speakers: Use A/B speaker selector.

CAUTION! Always turn volume down before switching inputs or powering off.

Specifications

• Power Output: 15 watts per channel RMS at 8 ohms.
• Frequency Response: 20Hz - 20kHz (±1dB).
• Total Harmonic Distortion: Less than 0.5% at rated power.
• Input Sensitivity: Phono: 2.5mV, AUX: 150mV.
• Signal-to-Noise Ratio: Phono: 70dB, AUX: 80dB.
• Tuner Section: FM stereo, AM tuner.
• Power Requirements: 120V AC, 60Hz.
• Dimensions: Standard component width.

Controls and Settings

Front Panel: POWER, VOLUME, INPUT SELECTOR, BASS, TREBLE, LOUDNESS, TAPE MONITOR, SPEAKER SELECTOR.

Rear Panel: Speaker terminals, Phono input, AUX input, Tape inputs/outputs, AC power cord, FM/AM antenna terminals.

Tone Controls: Bass (±10dB at 100Hz), Treble (±10dB at 10kHz). Loudness: Compensates for Fletcher-Munson curve. Input Selector: PHONO, TUNER, AUX, TAPE 1, TAPE 2. Speaker Selector: A, B, A+B, OFF.

Connecting Components

Speakers: Use 16-gauge or larger speaker wire. Phono: Connect turntable ground wire. Tape: Use RCA cables for record/playback.

1. Turn off receiver before connecting components.
2. Match left/right channels (white/red RCA connectors).
3. Ensure proper grounding for phono input.
4. Connect FM antenna for best reception.

Tip: Keep signal cables away from power cords to reduce hum.

Tuner Operation

FM/AM tuning with signal strength meter.

1. Select TUNER input.
2. Use tuning knob to find stations.
3. Watch stereo indicator for FM stereo broadcasts.
4. Use signal strength meter for best reception.
5. For weak stations, switch to mono for better reception.

Note: Proper antenna positioning crucial for FM reception quality.

Audio Controls

Bass Control: Adjusts low frequencies. Treble Control: Adjusts high frequencies. Loudness: Boosts bass and treble at low volumes. Balance: Adjusts left/right channel balance. Tape Monitor: Allows monitoring of tape recording.

Care & Maintenance

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

CAUTION! Do not use solvents or abrasive cleaners. Keep ventilation openings clear.

Regulatory Information

FCC compliant for home use. Manufactured to Marantz quality standards. For service, contact authorized Marantz service centers. Copyright © Marantz.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No sound	Speaker connections/volume	Check speaker wires; ensure volume up; verify speaker selector.
Hum in phono	Ground connection	Connect turntable ground wire to ground terminal.
Poor FM reception	Antenna placement	Reposition FM antenna; ensure proper connection.
One channel dead	Cable/connection	Check RCA cables; try different input source.
Distortion	Overload/settings	Reduce volume; check input level; adjust tone controls.

Service: Contact authorized Marantz service center for internal repairs.