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Profesional Karaoke System - Digital Echo With Effect - Low Noise And Low Distoration - Speaker impedance 4-16ohm - SNR : -90dbn - Input power = 12V DC5A AC 220V-240V - Input impedance: 47K - Output power 40W-R.M.S 20W - Frekuensi : 20Hz-20KHz - Input sensity : 0,25mV-220mV