Model Number: CSN-255 Brand Name: SHIYA Key Specifications/Special Features: Feature:1. Design of pilot hole double angle, transverse section through the sector horn layout, let the sound possess a clear positioning in the broader scope, so that you can enjoy the powerfulscenefeeling;2. Can adjust the sound quality and anti-whistle function according to the use of different room environment settings switch. Treble automatic reset protection device is quite perfect. Model No.Dimensions(DxWxH)Rated/Max power Weight CSN-255 251*458*270mm 150W/300W 7.8kg CS-355 284*506*291mm 175W/350W 9.8kg CSN-455 283*506*290mm 225W/450W 10.5kg CSV-450 297*558*292mm 250W/500W 11.5kg CSR-800S 324*562*270mm 150W/300W 13kg CSX-850 284*520*298mm 250W/500W 12.3kg CSR-1000 336*568*350mm 300W/700W 18.5kg