A few months ago I paid rather too much for a device no one else could sell me but whoever it was on eBay, to take one optical signal and ACTIVELY (as opposed to the passive type of non-powered gadget) split the signal into 2 optical outputs. Unfortunately, I managed to connect it to the wrong power supply (never mind why, but it never occurred to me that the difference between 5V and 6V would make a difference) and after working perfectly when it first arrived, is essentially useless