Amplifiers are items in Need for Speed: World which can boost the income of Rep, Cash and give all cars durability for seven days. Amplifiers can only be bought with SpeedBoost. Amplifiers are also usually featured in Web Deals offers which can be found on the Need for Speed: World website.
The Cash Amplifier doubles the cash awarded in events, pursuits and Treasure Hunt and lasts ten days. Players can obtain an Amplifier at the end of a race after the results screen for a cost of 500. It can also be obtained in the Amplifer section of the Need for Speed: World website.
The Rep Amplifier doubles the rep (XP) awarded in events, pursuits and Treasure Hunt and lasts ten days which will also make the player level up faster. Players can obtain the rep amplifier at the end of the end of race for 400. It can also be obtained in the Amplifer section of the Need for Speed: World website, however, for a cost of 500 instead.
Insurance is an amplifier which will make all cars have 100% durability for seven days meaning that the player won't have to repair their cars. An Insurance can only be obtained individually in the Safehouse for 350.
The remaining time for the amplifier is calculated from the minute it was purchased. Before August 24th, 2011, both of the Cash & Rep Amplifiers only gave 25 % Cash/Rep boost for 7 days