Marantz 2325 Receiver Manual

The Marantz 2325 is a classic stereo receiver from the 1970s, featuring 125 watts per channel RMS power, high-quality analog tuning, multiple audio inputs/outputs, and the iconic Marantz tuning dial and blue display. This manual covers operation, connections, specifications, and maintenance for optimal performance of this vintage audio component.

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

Features at a Glance

Key components: High-power amplifier section, precision analog tuner, multiple input/output connections, walnut wood case, and classic Marantz styling.

Feature	Description
Power Output	125 watts per channel RMS (8 ohms)
Tuner Section	AM/FM stereo with analog tuning dial
Inputs	Phono, Aux, Tape 1, Tape 2
Outputs	Speaker A/B, Headphone, Tape Out
Tone Controls	Bass, Treble, Loudness contour
Filter	High and low filters
Power Switch	Main power with indicator light
Volume Control	Analog potentiometer with smooth action
Balance Control	Left/Right channel balance
Muting	20dB muting switch

Installation

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

Connect speakers: Use speaker wire to connect to Speaker A or B terminals.
Connect audio sources: Turntable to Phono input, other sources to Aux or Tape inputs.
Connect antenna: FM dipole antenna to FM terminals, AM loop antenna to AM terminals.
Plug into AC power outlet.

WARNING! Ensure proper ventilation; do not block ventilation slots. Use correct speaker impedance (4-16 ohms).

First-Time Setup

Power on receiver; allow warm-up for optimal performance.

Select input source: Turn selector knob to Phono, Aux, or Tape as needed.
Adjust volume: Start with low volume and increase gradually.
Tune FM stations: Use tuning dial and signal strength meter for best reception.
Set tone controls: Adjust bass and treble to personal preference.

CAUTION! Do not operate with cover removed. High voltages present inside.

Specifications

Power Output: 125 watts per channel RMS at 8 ohms
Total Harmonic Distortion: Less than 0.15%
Frequency Response: 10Hz - 50kHz (+0, -1dB)
Input Sensitivity: Phono: 2.5mV, Aux: 250mV
Signal-to-Noise Ratio: Phono: 75dB, Aux: 90dB
Tuner Section: FM sensitivity: 1.8uV
Dimensions: 19-1/4" W x 6-3/4" H x 15-3/4" D
Weight: 42 lbs
Power Requirements: 120V AC, 60Hz

Controls and Settings

Front panel controls: Power switch, Input selector, Volume, Balance, Bass, Treble, Loudness, Filter switches, Muting.

Rear Panel: Speaker terminals, Input/output jacks, Antenna terminals, AC power cord.

Tone Controls: Bass ±10dB at 50Hz, Treble ±10dB at 15kHz. Filters: High filter cuts above 7kHz, Low filter cuts below 70Hz. Loudness: Compensates for low-volume listening.

Connecting Devices

Phono: For turntables (magnetic cartridge). Aux: For CD players, tuners, etc. Tape: For tape decks with record/playback.

Turn off receiver before making connections.
Match cable types to inputs (RCA cables for line level).
Connect speakers observing correct polarity.
Position antennas for best FM reception.

Tip: Use high-quality cables for best audio performance.

Audio Adjustments

Optimize sound quality with proper control settings.

Volume: Adjust to comfortable listening level.
Balance: Center for equal left/right sound.
Bass/Treble: Adjust to room acoustics and program material.
Loudness: Engage for low-volume listening enhancement.
Filters: Use to reduce high-frequency hiss or low-frequency rumble.
Muting: Temporarily reduce volume by 20dB.

WARNING! Avoid extreme tone control settings which may cause distortion.

Maintenance

Keep unit clean and dust-free. Use soft, dry cloth for exterior cleaning.

CAUTION! Unplug before cleaning. Do not use liquid cleaners. Professional service recommended for internal maintenance.

Regulatory Information

FCC compliant for home audio equipment. Manufactured to Marantz quality standards. This product may be covered by one or more patents. For service information, contact authorized Marantz service centers.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No sound	Input selection/volume	Check input selector; increase volume; verify speaker connections.
Distorted sound	Overload/damaged speakers	Reduce volume; check speaker condition; verify source quality.
Poor FM reception	Antenna placement	Reposition FM antenna; ensure proper connection.
Hum or noise	Grounding/cables	Check ground connections; replace damaged cables.
One channel silent	Balance control/cable	Center balance control; check interconnecting cables.

Service: Contact authorized Marantz service center for internal repairs.