The AMP-4-125 power amplifier delivers configurable and reliable high-performance audio power amplification for commercial and hospitality applications requiring a mix of low-impedance and high-impedance outputs. Featuring a compact 1U half-rack design, this DSP-enabled Class-D amplifier supports low-impedance 4ohms to 16ohms loudspeakers and high-impedance 70/100V transformer-coupled loudspeakers. The AMP-4-125 accepts 4 analog inputs and one stereo S/PDIF digital input, delivering four low impedance mono channels (or two low impedance stereo zones) at 125W per channel or two 70/100V mono channels at 250W per channel. For setup, the RTI web GUI offers effortless browser-based configuration of the installed system. DSP Configuration options include multi-zone setup, input mixing, priority and ducking, restrictions, input and output EQ, S/PDIF output routing, high-pass filtering, speaker presets, delay, Wall-S1 controller configuration, sine wave generation and more.