1.this speaker is 2* 5.5" line array system 2.full sound,good penetrating,high peformance, 3.frequency response: 80 Hz-18kHz This speaker is 2* 5.5" line array system:MT500TYPECompact, two-way passiveOperating frequency range80 Hz-18kHzFrequency response90 Hz-18kHz±4dBPhase response1.7 kHz-18 kHz±30°Maximum peak SPL115 dBDynamic range>100 dBAcoustical crossover1100 HzHorizontal coverage100° ...