Marantz SC-7S2 Manual

The Marantz SC-7S2 is a high-end audio preamplifier featuring advanced HDAM (Hyper Dynamic Amplifier Module) technology, balanced XLR inputs and outputs, multiple analog inputs, phono stage for turntables, remote control capability, and premium build quality. Designed for audiophiles seeking exceptional sound reproduction with low distortion and wide frequency response. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

Features at a Glance

Key components: HDAM circuitry, balanced XLR inputs/outputs, phono input, multiple line inputs, remote control, premium volume control, direct mode.

Feature	Description
HDAM Technology	Hyper Dynamic Amplifier Module for superior sound quality
Balanced XLR Inputs	For noise-reduced connection to balanced sources
Balanced XLR Outputs	For connection to balanced power amplifiers
Phono Input	MM/MC cartridge compatible with adjustable loading
Line Level Inputs	Multiple RCA inputs for CD, tuner, tape, etc.
Direct Mode	Bypasses tone controls for pure signal path
Remote Control	Infrared remote for volume and source selection
Volume Control	Precision stepped attenuator for accurate level control
Power Supply	Dual-mono power supply design
Build Quality	Copper-plated chassis for reduced electromagnetic interference

Installation

Unpack and inspect contents. Place on stable, vibration-free surface.

1. Connect source components: Use high-quality interconnects for CD player, turntable, etc.
2. Connect to power amplifier: Use balanced XLR or unbalanced RCA cables.
3. Connect phono: Use ground wire from turntable to ground terminal.
4. Plug into AC power using supplied power cord.
5. Ensure proper ventilation around unit.

WARNING! Unit contains sensitive electronic components; handle with care. Ensure proper grounding.

First-Time Setup

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

1. Source selection: Use INPUT selector to choose connected source.
2. Volume setting: Start with volume at minimum, gradually increase.
3. Phono setup: Adjust loading and gain for your cartridge type.
4. Balance control: Center for equal left/right channel output.
5. Direct mode: Engage for pure signal path bypassing tone controls.

CAUTION! Always turn volume down before powering on/off to protect speakers.

Specifications

• Frequency Response: 5Hz - 100kHz (+0/-3dB)
• Total Harmonic Distortion: 0.001% (1kHz)
• Signal-to-Noise Ratio: 100dB (line), 80dB (phono MM)
• Input Sensitivity: 200mV (line), 0.25mV (MC), 2.5mV (MM)
• Input Impedance: 47k ohms (line), adjustable (phono)
• Output Level: 2V (RCA), 4V (XLR balanced)
• Gain: 12dB (line), 40dB (MM), 60dB (MC)
• Power Consumption: 25W
• Dimensions: 440mm W × 130mm H × 430mm D
• Weight: 15kg

Controls and Settings

Front Panel: POWER, INPUT SELECTOR, VOLUME, BALANCE, MUTE, DIRECT MODE.

Remote: POWER, INPUT SELECTION, VOLUME UP/DOWN, MUTE, DIRECT MODE.

Input Selection: CD, TUNER, PHONO, AUX, TAPE. Phono Settings: MM/MC selection, impedance loading, capacitance adjustment. Balance Control: Adjust left/right channel balance. Direct Mode: Bypasses tone and balance controls. Mute: Temporarily silences output.

Connecting Devices

Line Level Sources: Use RCA cables to appropriate inputs. Balanced Sources: Use XLR cables to balanced inputs. Phono: Connect turntable to phono input with ground wire.

1. Turn off all components before making connections.
2. Use high-quality cables appropriate for each connection type.
3. Ensure proper grounding for phono connections.
4. Keep signal cables away from power cables to prevent interference.

Tip: Use balanced connections whenever possible for best noise rejection.

Phono Stage Setup

Supports both MM (Moving Magnet) and MC (Moving Coil) cartridges.

1. Cartridge type: Select MM or MC using rear panel switch.
2. Impedance loading: Adjust for MC cartridges (100, 220, 470 ohms).
3. Capacitance: Adjust for MM cartridges (100, 220, 470pF).
4. Ground connection: Connect turntable ground wire to ground terminal.
5. Gain adjustment: Use internal jumpers for MC cartridge gain.

WARNING! Always power off when changing phono settings. Match settings to your specific cartridge specifications.

Balanced Operation

XLR balanced connections provide superior noise rejection and signal integrity.

Pin Configuration: Pin 1 (Ground), Pin 2 (Hot/+), Pin 3 (Cold/-). Benefits: Reduced hum and noise, better common-mode rejection, higher signal levels. Usage: Connect balanced sources to XLR inputs, balanced amplifiers to XLR outputs.

Care & Maintenance

Unplug before cleaning. Use soft, dry cloth for exterior. Avoid chemical cleaners.

CAUTION! Do not use liquids or aerosols. Keep away from moisture and extreme temperatures. Allow proper ventilation.

Regulatory Information

CE compliant; meets European safety and EMC standards. RoHS compliant. Copyright © Marantz. For support, visit www.marantz.com or contact authorized Marantz service centers. Serial number located on rear panel.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No sound	Volume/mute/connections	Check volume setting; disengage mute; verify all connections.
Hum in phono	Ground connection	Ensure turntable ground wire connected to ground terminal.
One channel silent	Balance/cables	Check balance control; verify cable connections; try different input.
Distorted sound	Input level/connections	Reduce source output level; check for damaged cables.
Remote not working	Batteries/obstacles	Replace batteries; ensure clear path to IR sensor.

Reset: Power cycle unit if experiencing operational issues.

Service: Contact authorized Marantz service center; www.marantz.com