Marantz 250 Manual

The Marantz 250 is a high-performance stereo receiver featuring 250 watts per channel, advanced audio processing, multiple input/output options, AM/FM tuner with presets, phono input, tape monitoring, tone controls, loudness compensation, and remote control operation. Designed for audiophiles seeking premium sound quality with robust connectivity. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

Features at a Glance

Key components: High-power amplifier section, AM/FM tuner, Phono input, Multiple audio inputs, Tape monitoring, Remote control, Speaker outputs.

Feature	Description
Power Output	250 watts per channel (8 ohms)
AM/FM Tuner	With 30 station presets
Phono Input	For turntable connection
Audio Inputs	CD, AUX, Tape 1, Tape 2
Tape Monitoring	Record and playback monitoring
Tone Controls	Bass, Treble, Midrange adjustment
Loudness Compensation	Enhanced low-volume listening
Speaker Selector	A/B speaker switching
Headphone Jack	For private listening
Remote Control	Full function infrared remote

Installation

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

1. Connect speakers: Use heavy-gauge speaker wire to A/B speaker terminals.
2. Connect audio sources: Use appropriate inputs for CD player, turntable, tape deck.
3. Connect antenna: AM loop antenna and FM dipole antenna for optimal reception.
4. Plug into AC power outlet.

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

First-Time Setup

Power on receiver; initialize system settings.

1. Set input source: Rotate input selector to desired source (Phono, CD, etc.).
2. Tune FM stations: Use auto-scan to program FM presets.
3. Adjust tone controls: Set bass, treble, and midrange to preference.
4. Configure speakers: Select A/B speakers as needed.

CAUTION! Keep away from moisture and heat sources. Allow adequate space for cooling.

Specifications

• Power Output: 250W RMS per channel (8 ohms, 20Hz-20kHz)
• Total Harmonic Distortion: 0.05%
• Frequency Response: 10Hz-100kHz (+0/-3dB)
• Signal-to-Noise Ratio: 100dB (line inputs)
• Input Sensitivity: Phono: 2.5mV, Line: 150mV
• Tuner Section: AM/FM with 30 presets
• Inputs: Phono, CD, AUX, Tape 1, Tape 2
• Outputs: Speaker A/B, Tape out, Headphone
• Power Requirements: 120V AC, 60Hz
• Dimensions: 17-1/4" W x 6-3/4" H x 15-3/4" D

Controls and Settings

Front Panel: Power switch, Input selector, Volume control, Tone controls, Loudness switch, Speaker selector, Headphone jack.

Remote: Power, Volume, Mute, Input selection, Tuner controls, Tone adjustments.

Tone Controls: Bass (±10dB), Treble (±10dB), Midrange (±6dB). Tuner: Auto-scan, Manual tuning, Preset memory. Special Features: Loudness compensation, Tape monitoring, Phono equalization.

Connecting Devices

Audio Sources: Phono, CD, AUX, Tape decks. Speakers: A/B outputs.

1. Turn off power before making connections.
2. Match cables to appropriate inputs (RCA for line level, specialized for phono).
3. Connect speakers observing correct polarity.
4. Select input via front panel selector.

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

Tuner Operation

AM/FM reception with preset memory.

1. Select Tuner input on front panel.
2. Choose AM or FM band.
3. Auto-scan: Press SCAN to automatically find and store stations.
4. Manual tuning: Use TUNE buttons for precise frequency selection.
5. Store presets: Tune to station, press and hold preset button.
6. Recall presets: Press numbered preset buttons.

WARNING! Ensure proper antenna connection for best reception quality.

Audio Features

Tone Controls: Adjust bass, treble, midrange frequencies. Loudness: Compensates for Fletcher-Munson curves at low volumes. Tape Monitoring: Monitor tape recording/playback. Phono Stage: RIAA equalized input for magnetic cartridges.

Care & Maintenance

Unplug before cleaning. Use soft, dry cloth for exterior. Keep ventilation openings clear of dust.

CAUTION! Do not use liquid cleaners. Avoid spraying near controls or ventilation.

Regulatory Information

FCC Part 15: Class B digital device compliant. UL listed for safety. Copyright and trademarks owned by Marantz America. For technical support, visit www.marantz.com or contact 1-800-270-2753.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No sound from speakers	Speaker connections/selector	Check speaker wires; ensure speaker selector is on.
Distorted sound	Overload/clipping	Reduce volume; check source level; verify speaker impedance.
Poor FM reception	Antenna placement	Reposition FM antenna; ensure proper connection.
Remote not working	Batteries/obstructions	Replace batteries; ensure clear path to IR sensor.
Hum or noise	Grounding issues	Check cable connections; ensure proper grounding.

Reset: Disconnect power for 30 seconds to reset microprocessor.

Service: 1-800-270-2753; www.marantz.com