Transform your Walkman or Discman unit into a complete system with these Sony Active Speakers. The 10-watt speakers offer a wide-range, powerful listening alternative to a portable unit"s headphones. Speakers feature a dynamic sound duct and built-in Mega Bass for deep, rich bass sounds, magnetic shielding for use near television sets or computer monitors, 57mm driver units, 70Hz-20kHz frequency response, stereo mini plug input, AC adaptor and connecting cords.