Quatro 2 Besides smooth trebles and crystal clear highs, its innovative design Ð which uses not one or two, but four cleverly positioned bass reflex panels Ð quadruples the bass. Features Besides smooth trebles and crystal clear highs, its innovative design Ð which uses not one or two, but four cleverly positioned bass reflex panels Ð quadruples the bass. This produces a phenomenal replication of the aural experience of a 2.1 sound system, with the fullest bass lines and punchiest beats the industry has ever heard from just two micro speakers. The SonicGear Quatro 2 redefines what a 2.0 speaker can do Four cleverly positioned bass reflex panels Relies solely on a 5V USB port found on any laptop or PC High efficiency digital amps Advanced quad bass reflex technology Technical Specifications 2 Built-in 2Ó SonicGear Driver 4 Built-in bass reflex panel Total RMS 6 Watts Frequency response 50Hz-20KHz 5V USB powered