Artsound E4T B. System type: 2.0 system, Speaker placement: In-wall/in-ceiling, Tweeter size: 25.4 mm (1 "). RMS rated power: 50 W, Frequency range: 60 - 20000 Hz, Impedance: 16 Ом. Connectivity technology: Wired. Housing material: ABS synthetics, Plastic. Width: 322 mm, Depth: 160 mm, Height: 230 mm