Acoustic Research AR4131 BlackVault Speaker Dock 2.1 (Black) Sound-pressure level (SPL) - 96 dB at 3 feet Subwoofer Channel Frequency Response - 50 Hz - 160 Hz Left & right Channels Frequency Response - 100 Hz - 20 kHz Subwoofer Channel Signal-to-Noise Ratio - greater than 75 dB Left & Right Channels Signal-to-Noise Ratio - greater than 80 dB