Firstly the power supply in the Stereo 50 is a regulated SMPS, designed for 85V – 265V operation and the design has been verified against these voltages for normal operation.
Example: If we use Japan as an example country. Even given the mains supply’s regulation, the low voltage in Japan will lead to increased current in the power supply and so to increased heat.
The power-supply includes over-temperature protection which will cause shut-down in case it gets hot to endanger the safe operation. We have carried out long term tests at 90V, without experiencing any problems. If the unit is operates in a fairly hot room (summer, no aircon) and it’s ventilation is impeded it may enter thermal protection, which is self-resetting, so the unit may drop out and come back after a short time, work for a short and then drop out again.
