Marantz 2330 Owner's Manual

The Marantz 2330 is a high-performance stereo receiver featuring 30 watts per channel RMS power output, advanced tuning capabilities, and premium audio components. This classic receiver offers exceptional sound quality with features including FM/AM tuner, phono input for turntables, tape monitor circuits, loudness control, and tone adjustments. Below are key sections covering operation, features, connections, specifications, and maintenance.

1. Features at a Glance 2. Installation and Setup 3. Front Panel Controls 4. Rear Panel Connections 5. Specifications 6. Operating Instructions 7. Tuning and Reception 8. Audio Adjustments 9. Care & Maintenance 10. Troubleshooting

Features at a Glance

Key components: Power amplifier section, FM/AM tuner, preamplifier with multiple inputs, tuning meter, and comprehensive control panel.

Feature	Description
Power Output	30 watts per channel RMS (8 ohms)
Tuner Section	FM/AM with advanced tuning circuitry
Inputs	Phono, Aux, Tape 1, Tape 2
Tone Controls	Bass and treble with defeat switch
Loudness Control	Compensates for low volume listening
Speaker Selector	A/B speaker outputs
Headphone Jack	Front panel 1/4" stereo jack
Tuning Meter	Signal strength and center tuning indicators
Filter Switch	High filter for noise reduction
Power Switch	Main power on/off with indicator light

Installation and Setup

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

Connect speakers: Use speaker wire to connect to A or B speaker terminals.
Connect audio sources: Phono for turntable, Aux for CD player, Tape for recorders.
Connect antenna: FM antenna to 300 ohm terminals, AM loop antenna to AM terminals.
Plug into AC power outlet.

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

Front Panel Controls

Main controls: Power switch, input selector, volume, balance, tone controls, tuning knob.

Left Section: Power switch, speaker selector (A/B), input selector (Phono, Aux, Tape 1, Tape 2), volume control, balance control.

Center Section: Tuning knob, tuning meter, FM/AM selector, muting switch, loudness control.

Right Section: Bass control, treble control, tone defeat, high filter, headphone jack.

Rear Panel Connections

Speaker Terminals: A and B speaker outputs
Inputs: Phono, Aux, Tape 1, Tape 2
Tape Connections: Record and playback jacks
Antenna Terminals: FM 300 ohm, AM loop antenna
AC Outlet: Switched accessory outlet
Ground Terminal: For turntable ground wire

Tip: Ensure all connections are secure and cables are properly routed.

Specifications

Power Output: 30 watts per channel RMS at 8 ohms
Total Harmonic Distortion: Less than 0.3%
Frequency Response: 20Hz - 20kHz ±1dB
Input Sensitivity: Phono: 2.5mV, Aux: 150mV
Signal-to-Noise Ratio: Phono: 70dB, Aux: 90dB
Tone Controls: Bass: ±10dB at 100Hz, Treble: ±10dB at 10kHz
Power Requirements: 120V AC, 60Hz
Dimensions: Standard component width
Weight: Approximately 25 lbs

Operating Instructions

Basic operation steps for different audio sources.

Turn on power: Switch to ON position.
Select speakers: Choose A, B, or both.
Select input: Choose Phono, Aux, or Tape.
Adjust volume: Start at low volume and increase gradually.
For tuner: Select FM or AM and tune to desired station.

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

Tuning and Reception

FM/AM tuning procedures for optimal reception.

Select FM or AM with function switch.
Rotate tuning knob while watching tuning meter.
For FM stereo: Center meter for strongest signal and stereo indicator.
Use muting switch to eliminate inter-station noise.
For AM: Rotate radio for best reception.

Tip: Proper antenna positioning greatly improves reception quality.

Audio Adjustments

Tone and audio control settings for optimal sound.

Bass Control: Adjusts low frequencies. Turn clockwise to increase bass.

Treble Control: Adjusts high frequencies. Turn clockwise to increase treble.

Loudness Control: Engages bass boost at low volume levels for fuller sound.

Tone Defeat: Bypasses tone controls for flat frequency response.

High Filter: Reduces high frequency noise and hiss.

Care & Maintenance

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

CAUTION! Do not use liquids or aerosols directly on unit. Keep away from moisture and extreme temperatures.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No sound	Power/speaker selection	Check power connection; verify speaker selection; check volume level.
Distorted sound	Overload/connections	Reduce volume; check input levels; verify speaker connections.
Poor FM reception	Antenna/position	Check antenna connections; reposition antenna; ensure proper grounding.
Hum or noise	Grounding/cables	Check turntable ground; ensure cables are secure; use high filter.
One channel silent	Balance/connections	Check balance control; verify cable connections; test with headphones.

Service: For technical service, contact authorized Marantz service center.