300what 12volt converter ?

300 wat converter 12 volts for car van to use a laptop or tv brand new with box and paper work and extra lead cost 30 from maplins , bargain i think 15 pounds Hi like on description 12" Active subwoofer Made by FLI nearly new all spot on working 70 open to offers or read below... I can swap it for phone or tv, LCD monitor or computer, power tools.........anything which may be valuable for me just ask thats cost nothing but remember i offer only satisfaction with item you will get from me. only reason for selling that i have bought car with very good stereo system inside so that one is surplus HI folks, I have speaker dock for IPHONE and IPODS for sale. IT is less than a month old and is in perfect condition... Again I have the box for it. It comes with a remote and has some serious sound from it. It includes back lights and bass. Genuine reason for sale... I am saving for my first car and so trying to make as much money as possible. :) I bought it for 90 but as I have used it I have reduced the price quite a bit. No time wasters Kenwood SW-900 Super Sub Woofer. 75 ONO I no longer have need for this. Comes with remote [Amplifier] Practical maximum output: 70 W (50 Hz, EIAJ 10%, 6 ohm) Frequency response: 20 Hz to 60 Hz, 90 Hz, 120 Hz Phase switching: NORMAL, REVERSE Input sensitivity & input impedance: RCA-type pin-plug jack: 100 mV / 70 W 6 ohm, 5k ohm Push-type terminals: 1 V / 70 W 6 ohm, 12k ohm Supply voltage: AC 110 - 120 V~, AC 220 V~, AV 240 V~ Rated power comsumption: 80 W [Speaker]&