marantz pm 300 manual

The Marantz PM 300 is a high-quality stereo integrated amplifier featuring 30 watts per channel, MM phono input, multiple audio inputs, tone controls, loudness compensation, and headphone output. Designed for audiophile-grade performance with Marantz's signature sound quality and build construction. Below are key sections for features, installation, operation, specifications, and maintenance.

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

Features at a Glance

Key components: Stereo integrated amplifier, front panel controls, rear input/output terminals, remote control capability.

Feature	Description
Power Output	30 watts per channel (8 ohms)
Phono Input	MM phono stage for turntable connection
Audio Inputs	CD, Tuner, Aux, Tape
Tone Controls	Bass and treble adjustment
Loudness Compensation	Enhances bass at low volumes
Headphone Output	Front panel 1/4" jack
Speaker Terminals	Standard binding posts
Power Switch	Front panel main power control
Volume Control	Analog potentiometer
Input Selector	Rotary switch for source selection

Installation

Unpack and inspect contents. Place on stable, level surface with adequate ventilation.

Connect speakers: Use speaker wire to connect to A/B speaker terminals.
Connect audio sources: Use RCA cables for CD player, tuner, turntable, etc.
Connect turntable: Use PHONO input for moving magnet cartridges.
Plug into AC power outlet.

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

First-Time Setup

Power on amplifier; allow warm-up time for optimal performance.

Speaker connection: Ensure proper polarity (red to red, black to black).
Source connection: Connect all audio components to appropriate inputs.
Volume control: Start with volume at minimum position.
Input selection: Rotate selector to desired source.

CAUTION! Always turn volume down before powering on or switching sources.

Specifications

Power Output: 30W + 30W (8 ohms, 20Hz-20kHz)
Total Harmonic Distortion: 0.05% (1kHz at rated power)
Frequency Response: 10Hz-50kHz (+1/-3dB)
Input Sensitivity: Phono: 2.5mV, Line: 150mV
Signal-to-Noise Ratio: Phono: 80dB, Line: 95dB
Tone Control Range: Bass: ±8dB at 100Hz, Treble: ±8dB at 10kHz
Power Requirements: 120V AC, 60Hz, 120W
Dimensions: 440mm (W) x 115mm (H) x 310mm (D)
Weight: 6.5 kg

Controls and Settings

Front Panel: Power switch, Input selector, Volume control, Bass control, Treble control, Loudness switch, Headphone jack.

Rear Panel: Speaker terminals (A/B), Phono input, CD input, Tuner input, Aux input, Tape in/out, AC power cord.

Tone Controls: Bass and treble adjustment with center detent. Loudness: Compensates for Fletcher-Munson curve at low volumes. Input Selection: Phono, CD, Tuner, Aux, Tape. Speaker Selection: A/B speakers or both.

Connecting Devices

Audio Sources: Phono for turntable, CD for CD player, Tuner for radio tuner, Aux for additional sources.

Turn off amplifier before connecting devices.
Use quality RCA cables for all connections.
Match ground wire from turntable to phono ground terminal.
Select appropriate input via front panel selector.

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

Operation Guide

Basic operation for optimal sound quality.

Power on: Switch power button; wait for relay click.
Source selection: Rotate input selector to desired source.
Volume adjustment: Start low and increase gradually.
Tone adjustment: Use bass/treble controls to suit listening preference.
Loudness: Engage for low-volume listening.
Headphone use: Plug into front jack; speakers automatically mute.
Tape recording: Connect tape deck to tape output for recording.

WARNING! Do not operate with cover removed. Avoid excessive volume levels.

Maintenance

Unplug before cleaning. Use dry cloth only; no liquids or chemicals.

Keep ventilation openings clear of dust. Periodically check connections for corrosion.

CAUTION! Internal service should only be performed by qualified technicians.

Regulatory Information

FCC Part 15: Class B digital device; complies with interference limits. CE certified for European markets. Copyright © Marantz; all rights reserved. For technical support, contact authorized Marantz service centers.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No sound from speakers	Volume/connections	Check volume level; verify speaker connections; ensure input selected.
Distorted sound	Overload/settings	Reduce volume; check source level; verify tone control settings.
Hum or noise	Grounding/cables	Check phono ground; ensure proper cable routing; verify connections.
One channel silent	Connection/balance	Check RCA cables; verify speaker wiring; test with different source.
Overheating	Ventilation/impedance	Ensure adequate ventilation; verify speaker impedance compatibility.

Reset: Power cycle amplifier if issues persist.

Service: Contact authorized Marantz service center for internal repairs.