Normal mains is single ended. By changing this to balanced you remove noise and distortion from the mains by out of phase noise cancellation (like noise cancelling headphones). This is done by using a balanced line transformer to deliver the signal, in this case AC mains. It plugs in the mains wall socket and acts as a distribution box to four separate sockets mounted on the top of the unit, these can be used the same as any mains socket.
We are so confident in the quality of our products and designs that we offer a 30 day no-quibble returns policy.
Listen to NVA in your own system, in your own room - the best way to judge any item. If not 100% delighted, return it to us for a refund.