biggest subwoofer for a car

{"cid":"91195403","title":"Waterproof Bass Subwoofer Speakers 3 Inch Voice Coil 15 Inch 1 Ohm Anti Dust","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/a4\/5f\/7f34d3b5e7a88bacb82d07f3943a-200x200-1.jpg","attrs":{"Price":"Negotionation","Brand Name":"CR AUDIO","Model Number":"16SPL-15D1","Minimum Order Quantity":"Negotionation","Delivery Time":"40DAYS AFT RECEIPT THE PAYMENT","Place of Origin":"P.R.CHINA","Payment Terms":"T\/T, Western Union, MoneyGram","Supply Ability":"8--10 40HQ EVERY MONTH","Packaging Details":"CARTONS","MOTOR":"2PCS 190MM Y35 MAGNETS","BASKET":"12\" HEAVY DUTY","COIL":"3\" COIL","SPIDER":"2PCS NOMEX SPIDER","DUSTCAP":"PAPER","TERMINAL":"PUSH TERMINAL OR 8GA WIRE"}}