18KHz. Operating Temperature level: -20 ～ 50 ℃. Measurements: 193x151.5 x292mm. Network Column Audio Speaker GEN-6191A03 Power Supply: DC24V/1A or POE. Interaction Method: TCP/IP, UDP, SIP. Signal-to-Noise Ratio: > 90dB. IP PA System Frequency Reaction: 45Hz

The finite dimensions of the Airy disk sets an inevitable limit for the achievable resolving power of a visual instrument. Rayleigh discovered that two adjacent and equally shiny stars can just be resolved Should the picture of 1 star falls someplace near the innermost dim ring inside the Airy disk of the opposite star; the resolving power of the l