best subwoofer in the world

{"cid":"91195403","title":"Professional Competition Car Subwoofers 18 Inch Excellent Sound Effect","imgUrl":"https:\/\/img.chinax.com\/nimg\/a9\/b5\/933b07361173daa17737d1eb987e-200x200-1.jpg","attrs":{"Price":"Negotionation","Brand Name":"CR AUDIO","Model Number":"18CR","Minimum Order Quantity":"Negotionation","Delivery Time":"45days aft receipt the deposits","Certification":"CE","Place of Origin":"CHINA","Payment Terms":"Western Union, MoneyGram, T\/T, L\/C","Supply Ability":"50000PCS per month","Packaging Details":"carton","Coil":"4\"","Impendance":"8OHM","Frequency Response":"28-2.5khz","SIZE":"18\"","Name":"1000 watt rms subwoofer","Sensitivity":"98dB"}}