what are the best car subwoofers

{"cid":"91195403","title":"Professional Competition Car Subwoofers 18 Inch Excellent Sound Effect","imgUrl":"https:\/\/img.ismap.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"}}

{"cid":"91222093","title":"Soft PVC Jacket Low Voltage Cars 0 2 4 6 8 AWG Gauge Insulation Material PVC Car Audio Subwoofer Amplifier Power Cable","imgUrl":"https:\/\/img.ismap.com\/nimg\/ea\/a2\/c70b06059f4235a90a80cae6bfb6-200x200-1.jpg","attrs":{"Price":"Negotiable","Brand Name":"X LINK","Model Number":"0 gauge 4 gauge 2 gauge 8 gauge","Minimum Order Quantity":"20 rolls","Place of Origin":"Zhejiang, China","Insulation Material":"PVC","Type":"LOW VOLTAGE","Application":"Industrial","Conductor Material":"Copper","Jacket":"PVC","car audio power ground wire":"12V 0 2 4 8 10 gauge power wire cable","application":"car audio","jacket":"soft pvc","lead time":"20days","origin":"haiyan, zhejiang china"}}