AC Power 115V/230V DC power 24V~30V Lead-acid Battery 12V/5AH*2 Woofer 8” 6Ω/100W Tweeter piezoelectric Sensitivity of AUX IN/GUITAR -11dB/10K AUX Output -3dB/600Ω Treble Control ±10dB at 10KHz Bass Control ±10dB at 100Hz Power Output(RMS) 75W at 4Ω  loading (THD10%) Power Consumption 180VA T.H.D. <0.5% at 1 Watt output S/N ratio >60dB at 50W output Control Switcher Power Rotary switch TREBLE, BASS, MASTER Dimension 310mm(W)*515mm(H)*380mm(D)