18KHz. Operating Temperature: -20 ～ 50 ℃. Measurements: 193x151.5 x292mm. Network Column Speaker GEN-6191A03 Power Supply: DC24V/1A or POE. Communication Procedure: TCP/IP, UDP, SIP. Signal-to-Noise Proportion: > 90dB. Regularity Feedback: 45Hz https://donovanfcwti.myparisblog.com/30496782/spon-communications-blazing-a-trail-in-cutting-edge-ip-pa-system-designs