Bose GS2 Manual

The Bose GS2 is a professional-grade audio system designed for commercial applications, featuring advanced speaker technology, versatile mounting options, and robust construction for high-performance sound reinforcement. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

Features at a Glance

Key components: High-output speaker drivers, integrated amplifier module, mounting brackets, input connectors, and protective grille.

Feature	Description
Speaker Drivers	Dual high-excursion woofers and high-frequency compression driver
Amplifier Module	Integrated Class-D amplifier with thermal protection
Mounting Options	Ceiling, wall, or pole mounting with included hardware
Input Connectors	Speakon NL4 and terminal block for secure connections
Protective Grille	Steel mesh with powder-coat finish for durability
Power Input	100-240V AC, 50/60Hz universal power supply
Frequency Response	55Hz - 16kHz (±3dB)
Coverage Pattern	120° conical dispersion for wide coverage
Maximum SPL	125dB peak output
Protection Circuitry	Thermal, overload, and short-circuit protection

Installation

Unpack and inspect contents. Ensure mounting surface can support weight.

1. Select mounting location: Ceiling, wall, or pole based on application needs.
2. Mount bracket: Use included hardware to secure mounting bracket to surface.
3. Attach speaker: Secure speaker to bracket using provided locking mechanism.
4. Connect audio cables: Use Speakon or terminal block connections.
5. Connect power: Plug into appropriate AC power source.

WARNING! Speaker is heavy; use proper lifting techniques. Ensure all mounting hardware is securely tightened.

First-Time Setup

Power on system; verify proper operation.

1. Power connection: Connect to AC power source using included cable.
2. Audio input: Connect mixer or audio source to input connectors.
3. Initial test: Play audio at low volume to verify proper operation.
4. System configuration: Adjust input sensitivity if needed using internal DIP switches.
5. Coverage adjustment: Position speaker for optimal coverage area.

CAUTION! Ensure proper ventilation around amplifier module. Do not block cooling vents.

Specifications

• System Type: Two-way loudspeaker system with integrated amplifier
• Power Output: 500W continuous, 1000W peak
• Impedance: 8 ohms nominal
• Frequency Response: 55Hz - 16kHz (±3dB)
• Crossover Frequency: 1.8kHz
• Maximum SPL: 125dB peak
• Coverage Pattern: 120° conical
• Input Connectors: Speakon NL4, terminal block
• Power Requirements: 100-240V AC, 50/60Hz
• Dimensions: 15.75" × 9.84" × 9.84" (400mm × 250mm × 250mm)
• Weight: 22 lbs (10 kg)
• Operating Temperature: 32°F to 104°F (0°C to 40°C)

Controls and Settings

Access settings via internal DIP switches and external controls.

External Controls: Power switch, input sensitivity adjustment.

Internal DIP Switches: Located on amplifier module for system configuration:

• Switch 1: Input sensitivity (0.775V/1.0V/1.4V)
• Switch 2: High-pass filter (On/Off)
• Switch 3: Limiter threshold adjustment
• Switch 4: Thermal protection sensitivity

LED Indicators: Power (green), Signal present (blue), Limit (yellow), Fault (red).

Connecting Devices

Audio Sources: Mixer outputs, line-level sources, amplifier outputs.

1. Turn off all equipment before making connections.
2. Connect audio source: Use balanced XLR or 1/4" TRS cables to mixer outputs.
3. Connect to speaker: Use Speakon cables or terminal block connections.
4. Power sequence: Turn on audio source first, then speaker system.
5. Select input: Ensure proper input source is selected on mixer/controller.

Tip: Use high-quality shielded cables for best performance and noise reduction.

System Operation

Designed for continuous professional operation.

1. Power on: Switch power to ON position; green LED should illuminate.
2. Audio input: Connect audio source; blue LED indicates signal present.
3. Volume adjustment: Adjust at source (mixer) for desired output level.
4. Monitoring: Watch LED indicators for normal operation status.
5. Power off: Reduce volume to minimum before powering off system.
6. Multiple systems: For multiple speakers, ensure proper impedance matching.
7. Remote monitoring: Optional network control available with accessory module.
8. System protection: Automatic shutdown if thermal limits exceeded.

WARNING! Do not exceed maximum input levels. Allow proper cooling time after extended use.

Safety Features

Thermal Protection: Automatic shutdown if temperature exceeds safe limits. Overload Protection: Circuitry protects against excessive input signals. Short-Circuit Protection: Safeguards against output short circuits.

Care & Maintenance

Disconnect power before cleaning. Use soft, dry cloth only; avoid liquids or chemical cleaners.

Regular Maintenance:

• Monthly: Check all connections for tightness
• Quarterly: Inspect mounting hardware
• Annually: Professional inspection recommended

CAUTION! Do not use compressed air to clean vents. Keep away from moisture and extreme temperatures.

Regulatory Information

FCC Part 15: Class A digital device; complies with interference limits for commercial use. CE Certified: Meets European Union safety standards. RoHS Compliant: Free of hazardous substances. Copyright © 2025 Bose Corporation; all trademarks property of Bose Corporation. For support, visit www.bose.com/professional or contact 1-800-999-2673.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No sound output	Power/connections	Check power connection; verify audio source is active; check input cables.
Distorted sound	Input level/limiter	Reduce input level; check limiter settings; verify proper impedance matching.
System shuts down	Thermal overload	Allow cooling time; ensure proper ventilation; reduce output level.
LED indicators off	Power supply	Check AC power source; verify power cable connection; check circuit breaker.
Intermittent operation	Loose connections	Check all cable connections; inspect Speakon connectors; verify terminal block tightness.
Hum or noise	Grounding/cables	Check ground connections; use balanced cables; ensure proper cable routing.

Reset: Power cycle system; if issues persist, check internal DIP switch settings.

Service: 1-800-999-2673; www.bose.com/professional