Description
Features
- Discrete Class-A operational amplifiers and filters
- Optimised for sonic performance
- Low noise, high drive capability and gain bandwidth
- Careful design of the PCBs
- MP3 and WMA media capabilities
- Audio grade electrolytic capacitors
- Solid Polymer capacitors
- Rega K Power smoothing capacitors
- Enhanced and optimised control code
- Two Burr Brown PCM 1794 digital to analogue converters, running in parallel dual mono mode
- High-performance discrete Class A current to voltage amplifier
- Wide dynamic range, low distortion
- 10 separate power supply regulators are used in both the analogue and digital circuits
- 50 VA transformer
- The mechanism is graded and matched to the servo circuits
- Rega custom designed and CNC machined aluminium casework
- High quality anodised finish
- Aesthetic black chrome facia and lid
- CNC machined matching remote control
- Dimensions W 434mm x D 350mm x H 112mm
- Dimension needed to operate W 434mm x D 350mm x H 200mm
- Weight 19Kg
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Description
Regas flagship CD player, the Isis, is a product manufactured to the highest achievable quality inside and out including Rega's own unique CD technology, genuine black chrome lid and front facia and a custom solid anodised aluminium case weighing in at a notable 19kg! We hope you enjoy this very special CD player; we have spent a very long time creating it, drawing on our many years of experience in specialist hi-fi manufacturing.
Technology behind the design of the Isis
One important design goal was to take the current output, with no internal amplification within the D to A converter, and convert this to an analogue voltage, using discrete class A operational amplifiers and filters.
This circuit can then be optimised for sonic performance. (With most CD players the use of standard operational integrated circuits locks you into the sound of those particular integrated circuits, thus narrowing the scope for improvement). The class A current to voltage conversion amplifier, evolved out of the development of the first stage of the Rega Ios MC amplifier.
It shares identical demands of low noise, high drive capability and gain bandwidth required of the voltage to current amplifier. Careful choice has been made for every component in the digital and the analogue signal path to ensure the integrity of the signal.
The analogue and digital sections are bonded together using a substantial ground plane. It was found during the development of the player that adoption of RF ground plane techniques aided the sonic quality and therefore was included in the final design.
Careful design of the PCB's ensures isolation of not just the digital and analogue sections, but also the motor, display and user interface processor. All sonically critical electrolytic capacitors have been by-passed with polypropylene or polyester film capacitors. In addition to this, large value electrolytic capacitors have also been by-passed with audio grade electrolytic capacitors.
Power supply impedances in the digital to analogue converter are kept very low by the use of solid polymer capacitors. All power supplies utilise custom Rega K-Power smoothing capacitors, along with fast diodes which have been used throughout in power supply rectification.
The Isis uses enhanced and optimised control code for the control of the CD processor and user display.This speeds up the initialisation process by means of a tighter control interface between the user micro and CD processor.
Analogue section
The analogue section employs two Burr Brown PCM1794 digital to analogue converters, running in a parallel dual mono mode, driving a high-performance discrete class A current to voltage amplifier.
This combination generates an exceptionally wide dynamic range, low distortion, and linear signal. This drives an enhanc
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