Adastra RM120B 100V amplifier with integral 5 channel mixer in a 2U rack-mountable housing. Inputs include a balanced XLR for microphone with switchable phantom power and Vox override, 2 mic/line jack inputs and 2 RCA line inputs, of which one can be fed from the internal USB/SD player with built-in FM tuner and Bluetooth receiver. Bass & Treble EQ and Master volume control the overall output, which can power either 8 Ohms or 100V line speakers. Generous features and versatility provide a comprehensive control centre for commercial sound installations.