Ferrum HYPSOS Linear/Switching Hybrid Power System - Open BoxAll Ferrum HYPSOS Open Box units are tested, inspected and cleaned and are sold in like new condition. All it takes is a revolution You only get one chance to make a first impression. With this idea in mind, parent company HEM set out to conquer the world with Ferrum, a new brand, into which they distilled twenty years worth of experience of designing and manufacturing audio electronics. The building block of any great audio system is the power