Trevi HTS 9420. System type: 2.0 system, Recommended usage: universal, Speaker placement: Celing-mountable, Floor, Tabletop/bookshelf, Wall-mountable. RMS rated power: 120 W, Frequency range: 50 - 20000 Hz, Impedance: 8 Ом. Connectivity technology: Wired. Housing material: ABS synthetics. Width: 180 mm, Depth: 153 mm, Height: 244 mm