Professional Speaker,Speaker Box 1.Output power: 20W*2 2.Speaker Unit:6"*2+1"*4 3.5 Channal ... professional active speaker, peavey speaker, jbl professional speakers, active speaker, pc speaker, pa speaker, speaker, professional karaoke player, line array speaker, long throw professional speaker, professional concert ... ≥78 dB·Raw Material:·Electronic Component: ·Function:·Certification:· Speaker Box