Blue Sky?s entry level 2.1 system, MediaDesk offers full-range monitoring on the desktop and is optimized for computer-driven audio recording and production. Easily expandable to a 5.1 system as with all Blue Sky systems, MediaDesk 2.1 incorporates two ultra-compact 2-way satellite speakers, each featuring a high-quality 4" driver and a 1" tweeter, along with a dedicated 8" powered subwoofer and Bass Management System. MediaDesk can be easily upgraded to a space-efficient 5.1 multi-speaker system with an upgrade kit that includes three more satellites and a control module.2 x 4? 2-way satellites, with one inch soft dome tweeter 1 x 8? powered subwoofer2.1 bass-managementSubwoofer and Master Volume, located on the back of the Subwoofer3 x 60 Watts (60 Watts for each SAT & 60 Watts for the SUB)Drivers: Cast aluminum frame, 4" hemispherical driver and 1" tweeter?both fully video shieldedFrequency response: 100 Hz to 20 kHz ± 3dBDimensions: 9.5" H x 6.5" W x 5.75" DWeight: 7 lbsDrivers: Cast aluminum frame, 8" forward-firing driver with 1.5" voice coil?fully video shieldedPower: Dedicated 60-watt amplifier for the Subwoofer and one low-distortion 60-Watt amplifier for each MediaDesk SAT 2.1 Bass Management System (4th order, 100 Hz Linkwitz-Riley low-pass filter for the subwoofer, 2nd order 100Hz high pass filters for the satellite speakers)Frequency response: 35Hz to 100Hz ± 3dBDimensions: 15" H x 14" W x 15" DWeight: 35 lbs