Adastra US60 Compact 100V Slave Amplifier, 60W

The Adastra US60 is a versatile and compact 100V line slave amplifier, delivering 60W of RMS power for expanding and enhancing public address (PA) systems. Housed in a slim, half-width 1U chassis, this unit is designed for easy integration into rack cabinets, or it can be mounted under a worktop or against a wall using the included hardware. Its primary function is to seamlessly extend an existing 100V speaker system by connecting in parallel directly from the speaker cable, making it an ideal solution for adding zones or extra speakers without complex rewiring.

This amplifier offers exceptional flexibility in signal routing. It features multiple input options, including a standard RCA line input and a 100V line input via Euroblock connectors, allowing it to accept signals from a main amplifier or mixer. A key feature is the 24V fire alarm mute contacts, enabling integration with emergency sound systems for automatic muting during alarms. The output can be configured for either 100V line operation to drive multiple speakers or for a direct 8-ohm speaker load, connected via secure screw terminals on the rear panel.

Built with efficient Class D amplifier technology paired with a transformer output, the US60 provides reliable performance with low distortion. It boasts a wide frequency response from 100Hz to 18kHz and a high signal-to-noise ratio of 80dB, ensuring clear and intelligible audio reproduction for background music and speech. The unit is supplied with a standard UK mains plug (Type G) and is ready for immediate installation in small to medium-sized venues such as offices, retail spaces, restaurants, and schools.

Key Specifications

• RMS Output Power: 60 Watts
• Amplifier Construction: Class D with transformer output
• Inputs: Line in (RCA or Euroblock), 100V in (Euroblock)
• Line Output: 2x RCA (mono)
• Speaker Outputs: Screw terminals for 100V line, 8Ω, or