06/2026-2027

Providing and fixing of wall mounting handset station is an industrial-grade communication unit designed for public address and paging systems, suitable for harsh environments, featuring dual independent communication channels for paging and party-line communication with up to six users. It operates on 220V AC (±10%, 50/60 Hz) or 24V DC, with low power consumption (~180 mA at 220V AC), and includes a dynamic noise-cancelling microphone (≈0.7 mV/Pa sensitivity) and dynamic receiver delivering high sound pressure levels (~116 dB). The unit provides a 15 W RMS amplifier output (8/16 Ω), frequency response of approximately 200 Hz to 10–12 kHz, low distortion (~1%), and residual noise of about -50 dB. It supports paging via push-button, loudspeaker mute, adjustable volume control, and customizable functional switches. Built with robust housing (IP52, extendable to IP55 with cover).

Providing and fixing of pilfer-proof wall mounting extension amplifier is a rugged industrial communication unit designed for use with desktop handset stations in public address and party-line systems, featuring two independent communication channels for simultaneous paging and duplex conversation among up to six users. It operates on 220 V AC (±10%, 50/60 Hz) or 24 V DC, with current consumption of approximately 180 mA (AC) / 850 mA (DC), and incorporates a dynamic noise-cancelling microphone with ~0.7 mV/Pa sensitivity. The unit delivers 15 W RMS output (8/16 Ω) with frequency response of 200 Hz to 10–12 kHz, low distortion (~1%), and residual noise of about –50 dB, ensuring clear speech intelligibility in noisy industrial environments. It includes paging, party-line communication, speaker mute, volume control, and customizable function switches, along with built-in short-circuit protection. Constructed with a tamper-proof (pilfer-proof) modular design, IP52 protection (extendable to IP55), and operating temperature range of –20°C to +55°C, the unit is suitable for harsh, hazardous industrial applications, with typical dimensions of 354 × 150 × 225 mm and weight around 7 kg.

Providing and fixing of desktop handset station is an industrial-grade communication unit designed for use in public address and paging systems, featuring a rugged fiberglass housing with integrated handset and pre-amplification module for reliable operation in harsh and noisy environments. It supports two independent communication channels enabling paging and duplex party-line communication for up to six users, and is typically used in conjunction with extension amplifier LBD8924/02 for full system functionality. The unit operates on 220 V AC (±10%, 50/60 Hz) or 24 V DC, with low current consumption (~150 mA at 24 V DC), and incorporates a dynamic noise-cancelling microphone (≈0.7 mV/Pa sensitivity) ensuring clear voice transmission. It includes front panel controls for paging, loudspeaker mute, and adjustable volume, along with customizable function switches for priority and signaling features.

Supplying, installation, testing & commissioning of 1.5/3/6W metal/wooden box ceiling/wall speakers complete as required.

Providing and fixing of 6 W dual-cone speaker designed for high-quality speech and background music reproduction in public address systems, featuring a built-in 100 V line matching transformer with selectable power taps (6 W / 3 W / 1.5 W / 0.75 W) for flexible installation in distributed audio networks. It provides a wide frequency response of approximately 80 Hz to 18 kHz with good sensitivity (~92 dB SPL at 1 W/1 m) for clear and intelligible sound coverage in offices, retail spaces, and commercial buildings

Providing and fixing of booster power amplifier (480 W) is a high-performance industrial amplifier designed for large public address and voice evacuation systems, providing 480 W RMS output with support for 70 V / 100 V constant-voltage lines and 8/4 ohm low-impedance speakers for flexible system expansion. It features dual balanced XLR inputs with priority switching, loop-through capability, and an additional 100 V line input for slave operation, ensuring seamless integration with existing PA networks. The amplifier operates on 230 V AC (±10%, 50/60 Hz) or 24 V DC backup supply, with excellent audio performance including frequency response of approx. 50–18,000 Hz, low distortion (<1%), and high signal-to-noise ratio (>90 dB).

Providing and fixing of station junction box is an accessory unit designed for use with Bosch industrial public address handset stations, providing a robust and reliable interconnection interface between field stations and the central PA communication system.

Supplying & laying of 1.5 Sq mm, 6 Core power Armoured Cable, copper conductor having XLPE insulation, steel wire armouring & FRLS outer sheath complete as required

Supplying & laying of 2.5 Sq mm, 3 Core power Armoured Cable, copper conductor having XLPE insulation, steel wire armouring & FRLS outer sheath complete as required