Isis Valve Reference CDP CD Player

Valve IsisRef

Rega’s now legendary head electronics engineer Terry Bateman spent 10 years researching the concept of a CD player using valves in the output amplifier. Valves have been widely used in musical instrument and recording amplification from the 1950s to the present day, therefore it made great sense to develop a valve based CD player to match that of the signal chain found in such applications. 

Valve version of our reference Isis CDP

The valve Isis shares the same digital and USB sections as found in the solid-state version, however, the analogue stage is valve based with passive filtering. This stage uses two military specification triple mica 5814A (ECC82/12AU7) triodes being driven by the revolutionary Wolfson WM8741 ultra high performance digital to analogue converter.

Key Features

• Rega’s advanced CD technology
• Twin Wolfson DACs
• Rega ‘K-Power’ smoothing capacitors
• Custom designed reference case
• CNC reference remote control
• Lifetime warranty against manufacture defects

Design

• The valve Isis shares the same digital and USB sections as found in the solid state version, however, the analogue stage is valve based with passive filtering. This stage uses two military specification triple mica 5814A (ECC82/12AU7) triodes being driven by the revolutionary Wolfson WM8741 ultra high performance digital to analogue converter. The output buffer and transformer driver stage uses two ECC88 (6DJ8/6922) triodes. This, like its solid-state stablemate, is of an un-orthodox design. The design goal with this player was to keep away from the normal design approach of “let’s run it through a valve to make it sound warm”, but take advantage of industrial valve circuits to make an articulate and competent valve based CD player. Careful choice has been made for every component in the digital and the analogue signal path to ensure the integrity of the signal.
  Careful design of the PCBs 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, and fast diodes 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 will speed up the initialisation process by means of a tighter control interface between the user micro and CD processor.
  
  
• Technology 
• Digital section 
• Digital 
• Extra error correction 
• Super-stable phase lock loop 
• Low noise digital design 
• USB Input 
• Disc analysis 

Technical Specifications

Wavelength:  780 nm

Digital Sampling Frequency:  44.1 kHz

Power Consumption:  46 W

Dimensions (W × H × D):  434 × 112 × 350 mm

Dimension needed to operate (W × H × D):  434 × 200 × 350 mm

Weight:  19.5 kg