Oracle Audio CD2500 MkIV CD player & CD2000 MkIII CD transport

Design & Technology

CD Turntable Interface

Because the CD vibrates slightly due to the high rotational spin speed of the CD mechanism this vibration problem or "chatter problem" had to be addressed. Oracle Audio created an interface system that effectively controls this unwanted vibration through an innovative combination of materials and their interaction.

CD Coupling System

Chatter is a persistent feature of the compact disc, and it causes a major problem. The chatter or wobble of the disc causes the laser to lack focal clarity which results in distortion or misread information. This in turn causes the error correction circuitry to have to operate and sometimes to excess.

Oracle pioneered the now well established record clamp system to solve problems with analogue records back in 1979. A similar system has been developed by Oracle to combat CD chatter. Our Disc clamp acts to eliminate the chatter by magnetism coupled with a slight vacuum created by a thick Urethane washer; together these two effects solved the problems.

Craftsmanship

In order to achieve an impeccable natural finish on most of the machined parts, diamond cutting tools are used extensively. Each aluminium component is hand brushed and coated with a high gloss polyester lacquer to seal and preserve the beautiful natural appearance.

At Oracle Audio Technologies, people make the difference in manufacturing, they are craftsmen devoted to serving our customers. Their work creates pride of ownership; their passion for detail shows at every step of the manufacturing process. Their manufacturing techniques and skills result in a work of art.

The floating chassis

The floating chassis plays an important role within the CD 2500 and CD 2000; it must rigidly support both the mechanism and the adjacent electronics. Its maximum rigidity, its minimal surface area and energy control are key its design parameters. The floating chassis system as a whole, due to its high mass, contributes in effectively controlling vibrations with the aid of additional mechanical filters. The chassis nylon sleeve within the Cd enclosure eliminates the high frequencies, the Delrin drive decoupling pillars remove medium and high frequency interferences from the vicinity of the drive mechanism. Finally, a Urethane compound acts as a mechanical energy trap reducing any remaining vibration to an insignificant level.

Suspension

Because the world around a CD player vibrates, the mechanism must be isolated from it. Oracle’s suspension system has proved to be virtually the very best in the industry.

The Oracle CD 2500'S and CD 2000's floating chassis assembly is suspended and isolated from room vibrations using four suspension towers. Each suspension tower assembly combines no less than 12 different components on both the CD Drive/Player. The suspension system is a highly sophisticated device combining 7 different mechanical filters all working as a whole to effectively control unwanted vibrations.

The CD player's levelling feet with their convex shape represent the first barrier to limit vibrations from reaching the CD playing platform. The delrin suspension pillars will cut mid and higher frequencies and the upper spring rubber bushing controls spring resonances while the conical shape suspension spring takes care of the crucial lower frequencies. The spring adjustment sleeve provides spring calibration while controlling spring resonances and the sorbothane damper represents the mechanical energy trap reducing vibrations to an insignificant level. Finally, the felt dampers control inner spring resonances.