Low Pass Filter The subwoofer can deliver sound without distortion. Supplement your speakers high and mid-range with bass you can really feel down to the 38Hz range. DSP Bass Driver The 8” driver delivers powerful sound with rich, highly accurate bass. Deep lows don’t have to sound distorted and overblown. Automatic Standby The auto-standby feature ensures the unit is not using up unnecessary power when left idle. Leave the unit plugged in without worrying about driving up your electric bill. Lower Cabinet Resonance Edifier applies high-quality, medium-density fibreboard (MDF) materials that offer reduced cabinet resonance for the cleanest sound around.