Raptoxx RT-2020. Tweeter size: 12.7 mm. RMS rated power: 40 W, Frequency range: 40 - 20000 Hz, Signal-to-Noise Ratio (SNR): 87 dB. Packaging width: 270 mm, Packaging height: 285 mm. Audio output channels: 2.1, Subwoofer dimensions (WxHxD): 167 x 235 x 230 mm, Surround speaker dimensions (WxHxD): 92 x 30 x 25 mm