1.this speaker is 2* 5.5" line array system 2.full sound,good penetrating,high peformance, 3.frequency response: 50 Hz-18kHz ML500Operating frequency range255 Hz-18k HzFrequency response360 Hz-18kHz±4 dBPhase response1.7 kHz-18 kHz±30°Maximum peak SPL115 dBDynamic range>100 dBAcoustical crossover1100 HzHorizontal coverage100°Vertica coverageVaries, depending on array length and configurationLow/ ...