Mini USB Amplifier 1.multimedia USB amplifier 2.USB/SD supported 3.RMS Power:2*30W 4.Frequency response: 40Hz -4KHz 60watt Mini USB Amplifier1)RMS Power:2*30W2)Frequency response: 40Hz -4KHz 3)Input Sensitivity: ≤300mV 4)SNR:≥73dB5)T.H.D: ≤0.5 %6)Bass tone:+5.5dB –10dBTrebel tone: +5.5dB –10dB7)Means(W*H*D):205*85*265 MMFunction1)Input select2)Treble Volume,Bass Volum,Master Volume3)USB,SD/MMC ...