18KHz. Running Temperature: -10 ～ 50 ℃. Measurements: 440x300x44mm. Zone Combining Digital Amplifier NBS-2301 Power Supply ： A/C 220V, 50Hz. Power ： 130W ， 260W ， 360W ， 550W ， 700W. Interaction Protocol ： HTTP, TCP/IP, UDP, ARP, ICMP, IGMP. Signal-to-Noise Ratio ：. Mic Input 01: ≥ 65dB,. Mic Input https://freesoundeffects10639.blogthisbiz.com/36235774/the-ultimate-overview-to-establishing-your-ip-pa-system-successfully