Rated input: 30W
Impedance: 330 / 500 / 670Ω (100V line)
Sound pressure level: 108dB (1W/1m)
Frequency response: 225Hz～7kHz
Water proof performance: IP65
Dimensions: φ510 x 500 mm
Mass: Approx. 4.3kg
Specifications:
https://www.unipex.co.jp/seihin/download/pdfdata_en/CT510B.pdf