BOSCH LBB 4422/10 Power Amplifier WK 0849 100 – 240V 2*250W

The Bosch LBB 4422/10 is a high-performance, dual-channel power amplifier engineered for reliability and clarity in professional audio installations. Part of Bosch’s renowned Praesensa and older Plena series, this amplifier delivers 2 x 250 watts of clean power, making it the ideal core component for 100V line public address, voice alarm, and conference systems in corporate buildings, schools, hospitals, and transportation hubs.

With its wide-range 100-240V power supply, it offers global compatibility and stable operation under fluctuating voltage conditions. Built with the rugged quality you expect from Bosch, the LBB 4422/10 ensures your message is always heard with precision and authority.

Key Features & Benefits:

• High Power Output: Delivers 2 x 250 Watts into 100V lines, providing ample power to drive multiple speaker zones in medium to large-scale installations.

• Global Voltage Compatibility (100-240V AC): Automatically adjusts to mains voltages from 100V to 240V, making it suitable for deployment anywhere in the world without the need for a manual switch or external transformer.

• Dual-Channel Flexibility: Operate the two 250W channels independently for separate audio zones, or bridge them for a single high-power 500W output to a dedicated area.

• Priority Muting Function: Features a dedicated input for a priority source (e.g., emergency paging microphone) that can automatically mute background music or other audio inputs, ensuring critical announcements are always broadcast clearly.

• Robust Bosch Reliability: Designed and built for 24/7 operation in demanding environments. Features a rugged steel chassis, efficient cooling, and protection circuits against short circuits, overload, and overheating.

• Comprehensive Status Monitoring: Equipped with LED indicators for power, signal presence, clipping, and faults, allowing for quick and easy system status checks at a glance.

• Perfect for Bosch Systems: Seamlessly integrates with other Bosch Plena and Praesensa system components, including mixers, control panels, and call stations, for a complete and unified audio solution.

Technical Specifications at a Glance:

• Model: Bosch LBB 4422/10

• Output Power: 2 x 250 W (at 100 V line)

• Total Power: 500 W

• Mains Voltage: 100 – 240 V AC, 50/60 Hz (Auto-Switching)

• Signal-to-Noise Ratio: > 90 dB

• Total Harmonic Distortion (THD): < 0.5%

• Inputs: 2 x balanced (3-pin terminal block), 1 x Priority input

• Outputs: 2 x 100V line (terminal block)

• Cooling: Convection-cooled (fanless) for silent operation

• Dimensions (HxWxD): 2U Rack Unit (88 x 483 x 335 mm)