Adastra RS Series RS121 100V Line Slave Amplifier, Rack-Mountable 1U or 2U, 120W-480W

Adastra RS121 100V Line Slave Amplifier Overview

The Adastra RS121 is a powerful and efficient 100V line slave amplifier designed for commercial and professional audio installations. Ideal for extending speaker runs in large venues, offices, and public spaces, this compact unit delivers a reliable 120W RMS output in a lightweight 1U rack-mountable design. Whether integrating with an existing PA system or expanding coverage for background music and announcements, this amplifier ensures clear and consistent sound distribution. The Class-D amplification technology enhances efficiency, reducing power consumption while maintaining optimal performance. Its versatile connectivity options, including RCA and Euroblock line inputs and outputs, make installation straightforward for audio professionals seeking seamless signal distribution.

Designed with functionality in mind, the Adastra RS121 features multiple input options, including a slave line input via RCA or screw terminal connections, as well as a 100V signal input for direct integration with existing speaker setups. The amplifier supports both 100V speaker outputs and low-impedance connections down to 2 ohms, catering to diverse installation requirements. A built-in 24V mute contact allows for alarm panel integration, ensuring emergency announcements take priority when necessary. With a frequency response spanning 90Hz-20kHz in 100V mode and 17Hz-90kHz in low-impedance mode, the RS121 delivers clear and balanced sound. Its durable construction, fused protection, and IEC power input provide reliability for long-term installations in demanding environments.