20KHz. Running Temperature level: -10 ～ 55 ℃. Measurements: 126x66x27mm. Network Digital Amplifier XC-9508P Power Supply: AC100V ～ 240V, 50/60Hz. Power: 130W, 260W, 360W, 500W. Interaction Procedure: TCP/IP, UDP, SIP. Signal-to-Noise Proportion: > 80dB. Frequency Action: 60Hz https://felixfgvpj.blogolenta.com/26844985/the-ultimate-guide-to-setting-up-your-ip-pa-system-efficiently