The CLASSIC PSU USES an ultracapacitor instead of a rechargeable battery and can be viewed as a compact HD PREAMP power source. It USES silicon carbide diodes that are extremely fast and have no recovery time, they allow completely smooth corrections, and they include a cascade of silent regulators that provide a perfectly stable DC current for the Classic Line.

Can sing put for CD, decoding, and at the same time before grade 4 machine power supply, based on a large ring transformer power supply based on the benefit from the massive filtering, including high precision, low noise regulation each output circuit, four groups of power are independent design, and special design optimized sequential start-up and power function, improve the more NAGRA simplicity and stability of the system to use, it will revive all NAGRA device, and make them reach their full potential.