JBL GT4-15inch Sub 1000 Watts 250RMS ?

JBL GT4-15inch Sub 1000 Watts 250RMS 15inch JBL Subwoofer Power Handling: Peak: 1000 watts RMS: 250 watts Polypropylene Cone Rubber surround Over-sized motor design High temperature 4 ohm voice coil Frequency response: 23-450 Hz Sensitivity: 93 dB Me and my brother do car audio and we have a wide range of car subwoofers are prices go from £30 up to £500 for subwoofers, (WE CHARGE £20 TO FIT CAR STEREO HEAD UNIT) (WE CHARGE £20 IF YOU WANT US TO WIRER YOUR CAR ) IF YOU HAVE A ORIGINAL CAR STEREO HEAD UNIT THAT IS BILLT IN WITH YOUR CAR AND YOU WENT A CAR SUBWOOFER IN YOUR CAR BUT YOU DONT WENT TO CHANGE YOUR CAR STEREO WE HAVE JUST THAT WE CAN WIRE YOUR CAR WITH ANY CAR STEREO I MEAN ANY CAR STEREO. NO JOB IS BIG OR SMALL ( WE CHARGE £30 ) WE ALSO HAVE WIRING KITS FOR SALE !! FOR 8 GAUGE WIRING KIT IT IS £20 FOR 4 GAUGE WIRING KIT IT IS £30 FOR 1 GAUGE WIRING KIT IT IS £50 AUDIO ADAPTER RCA CONVERTER KIT IS £10 THIS IS FOR OLD OR ORIGINAL CAR STEREOS TO HAVE RCA INPUT CALL FOR MORE INFORMATION ---------------THANKS---------------