NAIM CD 555 Compact Disc Player

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Hotline: 0908 812 754
- Analogue Outputs DIN, RCA
- Line Outputs Fixed (level) 2.1V rms at 1kHz
- Output Impedance 10Ω maximum
- Minimum Load Impedance 10kΩ
- Frequency Response 10Hz – 20kHz, +0.1/-0.5dB
- thd+n <0.1%, 10Hz -18kHz at full level
- Phase Response Linear phase, absolute phase correct
- De-emphasis ±0.1dB referred to main response
- Remote Input RCA on rear (RC5)
- RS232 RJ45 (fitted but optionally connected)
- CD Formats Red Book
- Disc Compatibility CD, CD-R, CD-RW
- Power Supply Options 555PS, 2 x 555PS
- Dimensions 114 x 432 x 314mm (H x W x D)
- Front Brushed and black anodised
- Case Brushed and black anodised

- Key features of this fabulous player include a separate power supply from a transformer secondary winding, which is triple regulated, right through to the critical master clock and de-jittering circuitry. Special attention has also been paid to reducing capacitive coupling of high frequency noise from other supplies into this super quiet clock supply through interconnect cables and wiring looms. Two Burndy interconnects between the power supply and head unit discretely carry the digital and analogue supplies, and extend the principle of reducing capacitive coupling between power supplies as far as possible.

- The power supply incorporates significant upgrades over existing designs. More regulators have been used to isolate the supplies to various parts of the circuit, minimising their interaction.

- The CD555 Digital-to-Analogue Converters are mounted in a "quiet room". Apart from ensuring that all critical signals reaching the DAC have immeasurably low jitter the chips are inside a shielded enclosure to keep their environment free of the varying electric and magnetic fields that inevitably occur in a CD player, so enabling the converters to do their work, isolated from all external influences.

Other noteworthy design features of the CD555 include:

  • Machined, heavy, solid, transport tray to reduce resonance and vibration amplitude.
  • High mass design to improve suspension characteristics, providing isolation from the chassis and other components.
  • Low infra red reflective coatings around the CD to reduce eye pattern interference and noise.
  • Extremely low inertia and low resonance CD clamp.
  • Philips CD-Pro mechanism with a die-cast chassis.
  • Very heavy brass sub-chassis - separate for digital and analogue electronics.
  • Analogue stages, I-to-V conversion, filtering and output driver are built from discrete components.
  • Seven-pole output filters.
  • Separate low jitter clock circuit with its own multi-stage regulated power supply.
  • Post-digital filter de-jitter circuitry to eliminate jitter.
  • DAC%&&&%s are isolated from electric and magnetic fields.
  • Motorised top loading door.