Adastra 240W Slave Amplifier 100V or 2 Ohm

Adastra 240W Slave Amplifier 100V or 2 Ohm

Overview

The Adastra 240W Slave Amp is a high‑power, Class‑D slave amplifier designed for 100 V line audio systems. It provides 240 W RMS in a compact 1U, rack‑mount form factor. This unit is ideal for expanding existing announcement or background music systems, powering medium to large speaker arrays, or integrating into commercial, hospitality, or institutional installations.

Design and Build Quality

• 1U rack‑mountable chassis (19‑inch) with surface or rack mounting ears included.
• Robust cooling and lightweight design thanks to efficient Class‑D amplification.
• Reliable connectivity: RCA sockets and Euroblock (screw terminal) for line inputs/outputs, and 100 V input terminal for extending existing speaker lines.
• Switchable speaker output options: 100 V line or low‑impedance (down to 2 Ω) versions of the RS241 support flexibility in speaker configuration.
• 24 V mute contacts for safety or alarm panel integration; master volume and mute control are provided.

Key Technologies and Features

• Class‑D Amplification: High efficiency with reduced heat dissipation, allowing compact installation without compromising power output.
• Slave Input / Extendable Network: Accepts line‑level inputs from mixers or master amplifiers, plus a 100 V feed input to tap into existing speaker networks.
• Cascading Capability: Line out terminals allow connection to further RS‑series slave amps to scale up amplifier power and speaker coverage.
• Low‑Impedance Flexibility: On models like RS241, speaker outputs can be switched to low impedance (2 Ω) to suit conventional low‑impedance speaker arrays.
• Alarm Integration: 24‑volt mute contact for safety panels, enabling muting in emergency or alert situations.

Specifications

Performance and User Experience

The RS241 delivers reliable, stable audio output with consistent performance at high loads. On a 100 V line, it maintains clarity and headroom ideal for large‑scale public address or distributed audio systems. When used in low‑impedance mode, it offers even broader frequency response, suitable for higher quality audio distribution. The inclusion of mute contacts ensures compliance with safety or alarm systems.

Q&A Section

• Q: Can the RS241 be used to extend an existing 100 V speaker line?
  A: Yes -- it provides a 100 V input terminal so it can tap into, extend existing speaker runs, or be inserted downstream of existing amplifier feeds.
• Q: Does it support low impedance speaker loads?
  A: Yes -- the RS241 is switchable to low‑impedance output (down to 2 Ω), allowing use with conventional low‑impedance speakers.
• Q: How is remote muting handled?
  A: A 24 V mute contact is provided for connection to external alert or alarm panels to mute output if needed.
• Q: What kind of input sources does it accept?
  A: It accepts slave line‑level inputs via RCA or Euroblock screw terminals, and also a 100 V line input terminal for audio feeds already on the 100 V network.
• Q: What sort of environment is this amplifier best suited for?
  A: It is ideal for commercial installations such as schools, warehouses, shopping centres or any venue where multiple loudspeakers are distributed over long cable runs, or where 100 V line infrastructure is already in place.