Specifications: OUTPUT POWER (WATTS): 550W WOOFER: 12"BASSx2 INPUT: USB/SD CARD/FM IMPEDANCE: 4-8 OHMS SENTIVITY : ≥90DB QTY: 1PC/CARTON N.W (KG): 21.5 G.W (KG): 23.5 BOX SIZE (MM): 458x455x766