PWX Power Supply The case on this power supply is made of nonmagnetic aluminum and the top cover is coated with a special anti-resonance treatment. It features a 30W high current toroidal transformer with a protection coil between the primary and secondary coil, which also filters away common mode interferences. Lehmannaudio includes a special shielded cable between power supply and the audio section, and the cable is terminated with a Neutrik connector (with gold plated contacts) at the power supply side. website download product brochures