ตู้ลำโพง ยี่ห้อ BOSCH รุ่น LB1-UM20E-L 

The typical applications are theme bars, music restaurants, theme parks, retail outlets, audio visual, boardrooms and offices, exhibition areas and presentation environments, and fitness centers. Its sound reproduction capability is attributed to the use of high-quality driver components and crossover network design.

A self-restoring passive element protects the high-frequency driver against incidental overload. A 3-way ceramic terminal block with screw connections suitable for loop-through wiring is located in the compartment, at the base of the unit. An easy-to-install, sturdy wall mounting bracket is standard supplied. The same bracket can be used in combination with the universal floor stand LBC 1259/00 for temporary installations.

It is supplied with a built-in 70 / 100 V transformer with taps on the primary winding for full-power, half-power, quarter-power, and one-eighth power radiation. These taps are connected to a rotary vari-tap switch located in the compartment at the base of the enclosure, to allow simple output power setting. A low ohmic connection is also provided on the vari-tap switch.

Voice Alarm

This Voice alarm loudspeaker is specifically designed for use in buildings, where the performance of Public Address systems is subject to official regulations. It is designed for voice alarm systems, and is EN 54-24 certified and compliant with BS 5839-8 and EN 60849.

Protection

The loudspeaker has built-in protection to ensure that in the event of a fire damage there is no failure of the connected circuit. In this way, system integrity is maintained; ensuring loudspeakers in other areas can still be used to inform people of the situation.

Connections and Safety

The loudspeaker has a ceramic terminal block, thermal fuse, and heat-resistant, high-temperature wiring. The cabinets have a provision for internally mounting the line/loudspeaker supervision board (sold separately).

Certifications and Approvals

The loudspeaker is designed to withstand operating at its rated power for 100 hours in accordance with IEC 268-5 Power Handling Capacity (PHC) standards. Bosch has also developed the Simulated Acoustical Feedback Exposure (SAFE) test to demonstrate that the speakers can withstand 2 times their rated power for short durations.

This ensures extra reliability under extreme conditions, leading to greater customer satisfaction, longer operating life, and much less chance of failure or performance deterioration.

General

High-fidelity music and speech reproduction

Supplied with adjustable wall-mounting bracket

Self-restoring overload protection

Provision for internal mounting of the line / loudspeaker supervision board (sold separately)

EN 54-24 certified