Balun are transformers that are connected between a balanced load/source and an unbalanced load/source. A Balanced line has 2 conductors with equal currents in opposite directions while an unbalanced line has a solitary conductor with a current that returns via a common ground or earth path. Discount Computer Parts Center provides you with the best and the finest quality security products, including these high quality active video balun rack mount types, to keep your valuable assets safe and secured all the time. We have all the tools you'll need for your homes, offices, and other business establishments, to make sure your valuables are always kept secured, day and night.