Adastra 240W 1U 100V Line Slave Amplifier 19“ Rack

The Adastra RS241 (953.202UK) is a powerful 240W Class-D amplifier designed for professional audio installations, delivering efficient and reliable performance in a compact 1U rack-mountable chassis. Ideal for powering medium to large commercial sound systems, this slave amplifier expands an existing 100V line installation or works seamlessly with a mixer output to drive additional speakers.

Built to integrate into a wide range of audio setups, the RS241 features line level inputs via both RCA sockets and removable screw terminals for flexible connectivity. Cascade line outputs can be used to connect multiple RS slaves in a chain, enabling easy system expansion. A dedicated 100V input terminal allows direct connection to an existing 100V speaker feed, extending the reach of a current installation without additional mixers. The 24V mute contacts interface with security or alarm panels to mute the output instantly during alerts, ensuring safety and control.

The amplifier’s speaker outputs are switchable between 100V line and low impedance (stable down to 2 Ohms), providing the flexibility to connect multiple low-impedance speakers. With a frequency response of 90Hz to 20kHz on 100V and 17Hz to 90kHz at 2Ω, this unit delivers clear, high-quality sound. The footprint of 433mm x 267mm x 44mm fits neatly into a standard 19-inch rack, and the lightweight Class-D design ensures energy efficiency and minimal heat generation. The UK Type G mains plug (fitted with a T2A fuse) makes it ready for use in the UK, Ireland, Cyprus, Saudi Arabia, Malta, and other compatible regions.

The Adastra RS241 is a reliable, flexible solution for expanding your public address or background music system, ensuring clear and powerful audio transmission across a wide coverage area.