The RR-PSU is simple, yet elegant, solution comprises two modules one with a single multi pin connector, the other a 3U rack mount unit with a corresponding multi pin connector and two power supply sockets. These two modules are connected via a 5m long cable which allows the power supply to sit in a remote location, thus removing any fan noise from the level sensitive area. The RR-PSU can also be used in conjunction with the SD11, with the additional benefit of turning the SD11 into a redundant PSU system.