... RMS6W (3W+3W) THD=10% Frequency response: 150-18000HZ(+-3dB) Signal and Noise Ratio of Power amplifier: ≥80dB Loud speaker: 1 ... connect line(can choose)= 10% Frequency response: 150-1800Hz (±3dB) Signal and noise ratio of power amplifier: =80dB Loud speaker: 1 ... performance perfectMini audio box with new concept integral stereo portable mobile music, connecting your MP3, CD, DVD, iPod, iPhone, GPS, ...