We provide in our church with this PSU a Yamaha keyboard that is connected to an audio system. The original power supply of Yamaha had produced a hum that was refusing to be wiped with a DI box. The problem: The Orignal PSU is a switching regulator power supply (such as many power supplies nowadays), the power supply here, however still has a right transformer, with good galvanic and capacitive isolation! And until now, it has also held, all right, not bent. Would I buy it again.