Klipsch ProMedia 2.1 THX Certified Computer Speaker System (Black) THX-certified, three-piece computer audio system Exclusive Klipsch MicroTractrix Horn maximizes digital technologies such as CDs, MP3 downloads, and streaming radio programs 200-watt digital hybrid amplifier driven ProMedia 21 incorporates a convenient headphone jack as well as a miniplug input Compatible with laptop, smartphone, tablet and other devices via a headphone Jack and mini plug input 31 Hz to 20 kHz frequency response range