Thor RF11 When racks are involved space is generally a premium. The Smart Rack Guard 11 with adjustable sliding brackets is compact and neat without the bulk.. Industry leading spike/surge protection as well as SmartBrain filtering technology. The filtering will clean audio and visual components to ensure crystal clear picture and a “blacker” sound. Protection from interference typically caused by fluorescent lights, fridges, air-conditioners and the like can rob a system of its performance. Filtration provides solutions which assist in reducing of system hangs, file corruption, software glitches and system lockups. Why would you leave a system exposed to these common issues when there is a solution. Inside the Brain The Thor SmartBrain not only protects from surges, it also filters and cleans electrical frequency noise. The filter works both ways. Stopping noise from robbing equipment performance as well as connected devices' noise contaminating power.