Pro-Ject Speaker Box 5. Tweeter size: 25 mm, Woofer size: 130 mm. RMS rated power: 150 W, Frequency range: 55 - 20000 Hz, Impedance: 8 Ом. Weight: 4200 g. Type: In-wall/On-wall/In-ceiling speakers, Dimensions (WxDxH): 160 x 210 x 255 mm, Audio output channels: 1.0