Rega Isis - CD Player

ISIS
The Rega Isis reference CD player is built to the highest quality standards both inside and out and features Rega's proprietary CD technology, black chrome top and front and a solid anodised aluminium case weighing a substantial 19kg.

ISIS Technology
One of the most important design goals was to take the current output of the converter, with no internal amplification in the DAC, and transform it into a voltage, using discrete amplifiers and class A filters.

This type of circuitry can be optimised for acoustic quality, while the use of standard integrated op-amps is inextricably linked to the sound of these integrated circuits, reducing the scope for improvement. Interestingly, the Class A current/voltage conversion amplifier used in the Isis is an evolution of the first stage of the Rega IOS MC phono preamplifier.

It shares the same requirements of low noise, high drive capacity and wide band gain. We have been very careful in choosing each component in the digital and analog signal path to ensure signal integrity.

Careful PCB design ensures isolation not only of the digital and analog sections but also of the motor, display and user interface processor. All important electrolytic capacitors have been bypassed with polypropylene or polyester capacitors. Additionally, even the electrolytic capacitors with large values ​​have been bypassed with audio grade electrolytic capacitors.

Power supply impedances in the DAC are kept very low using solid polymer capacitors. All power supplies use custom Rega K-Power capacitors, along with fast diodes used throughout the power supply rectification.

Isis uses improved and optimized control code for processor and display control. This speeds up initialization by providing a more rigid control interface between the micro and the CD processor.