Marantz 2500 Owners Manual

The Marantz 2500 is a high-performance stereo receiver featuring 250 watts per channel RMS power output, advanced tuning capabilities, comprehensive input/output options, and premium audio components. This manual covers safety instructions, features, installation, operation, maintenance, and troubleshooting for optimal performance of your Marantz 2500 receiver.

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

Features at a Glance

Key components: High-power amplifier section, precision tuner, comprehensive input/output panel, front panel controls, and remote control capability.

Feature	Description
Power Output	250 watts per channel RMS (8 ohms)
Tuner Section	AM/FM stereo with quartz PLL synthesis
Inputs	Phono, CD, Aux, Tape 1, Tape 2
Outputs	Speaker A/B, headphones, tape record
Tone Controls	Bass, treble, loudness contour
Filter	Subsonic and high-cut filters
Power Switch	Main power with soft-start circuit
Volume Control	Motorized attenuator
Muting	Adjustable muting function
Protection	DC detection and thermal protection

Installation

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

Connect speakers: Use heavy-gauge speaker wire to Speaker A/B terminals.
Connect audio sources: Phono for turntable, CD for CD player, Aux for other sources.
Connect antenna: FM 75-ohm and AM loop antennas for optimal reception.
Plug into AC power outlet.

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

First-Time Setup

Power on receiver; allow 30 seconds for protection circuit to engage.

Select input source: Turn INPUT SELECTOR to desired source (Phono, CD, etc.).
Set volume: Start with volume at minimum, gradually increase to desired level.
Tuner setup: Extend FM antenna fully; rotate for best reception.
Speaker selection: Choose Speaker A, B, or A+B using front panel switches.

CAUTION! Always turn volume to minimum before powering on or changing sources.

Specifications

Power Output: 250W + 250W RMS (8 ohms, 20Hz-20kHz)
Total Harmonic Distortion: 0.05% at rated power
Frequency Response: 5Hz-100kHz (+0, -3dB)
Input Sensitivity: Phono: 2.5mV, CD/Aux: 150mV
Signal-to-Noise Ratio: Phono: 76dB, CD/Aux: 100dB
Tuner Section: FM sensitivity: 10.3dBf, AM sensitivity: 300μV/m
Power Requirements: 120V AC, 60Hz, 750W max
Dimensions: 21-1/4" W × 7-3/4" H × 18-1/2" D
Weight: 68 lbs (30.8 kg)

Controls and Settings

Front Panel: Power switch, input selector, volume, bass, treble, balance, loudness, filter switches, speaker selectors.

Main Controls: INPUT SELECTOR, VOLUME, BASS, TREBLE, BALANCE, LOUDNESS, FILTER, SPEAKER A/B.

Tone Controls: Bass ±10dB at 100Hz, Treble ±10dB at 10kHz. Filters: Subsonic (15Hz), High-cut (7kHz). Loudness: Compensation for low-volume listening. Balance: Left/right channel adjustment. Speaker Selection: A, B, or A+B operation.

Connecting Devices

Audio Inputs: Phono, CD, Aux, Tape 1, Tape 2. Outputs: Speaker terminals, headphone jack, tape record outputs.

Turn off power before making connections.
Match cable types to inputs (RCA for line level, proper grounding for phono).
Connect speakers observing correct polarity (+ to +, - to -).
Select appropriate input source on front panel.

Tip: Use high-quality interconnects and speaker cable for best performance.

Audio Settings

Optimize sound quality with proper tone and filter settings.

Bass/Treble: Adjust to suit room acoustics and program material.
Loudness: Engage for enhanced bass at low volume levels.
Filters: Use subsonic filter for turntable rumble, high-cut for hiss reduction.
Balance: Center image between speakers.
Muting: Temporary volume reduction (-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 or aerosols. Ensure adequate ventilation around unit.

Regulatory Information

FCC Part 15: Class B digital device; complies with interference limits for residential use. Copyright © Marantz; all rights reserved. For service and support, contact authorized Marantz service centers. Specifications subject to change without notice.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power	Power cord/switch	Check power cord connection; ensure power switch is on.
No sound	Speaker connections/muting	Verify speaker wires; check mute function; ensure protection circuit has released.
Distortion	Overload/settings	Reduce volume; check input levels; verify tone control settings.
Poor FM reception	Antenna/placement	Reposition FM antenna; check connections; avoid obstructions.
Protection mode	Overload/short circuit	Check speaker wires for shorts; allow unit to cool; reduce volume.

Reset: Power cycle unit if protection circuit engages frequently.

Service: Contact authorized Marantz service center for internal repairs.