CAMBRIDGE AUDIO AZUR 651C CD PLAYER
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HIẾT KẾ "SOUND FIRST"
Chúng tôi đã phát triển dòng 651 với một mục đích đơn giản đó là :
Để cho phép người dùng thưởng thức âm nhạc từ bất kỳ nguồn nào với chất lượng tuyệt vời
The 651Cs well-proven transport guarantees incredible rigidity, and the CD drawer itself has been designed to offer a smooth, high-end feel. To ensure simple operation, a high contrast reverse black DFSTN (Double Film Super Twisted Nematic) display offers clear feedback on the 651C's impressive features which now include CD-text support. As with all our Azur CD players, a high quality toroidal transformer ensures lower noise and less waveform distortion for quieter PSU operation.
CUSTOM CD SERVO DRIVE
Our CD-only S3 Custom CD ServoTM employs a custom designed chipset and the latest double-sided surface-mount technology for ultra-short signal paths with no wire links.
Our circuits and software have been meticulously designed and the S3 Servo dynamically adjusts focusing, tracking and output level of the laser in real-time, allowing for maximum retrieval of the digital information and jitter minimisation. This is all made possible by the implementation of a powerful ARM7 processor and complemented by a highly accurate master clock oscillator and carefully designed impedance-matched clock buffering scheme.
Twin Wolfson WM8742 digital to analogue converters deliver significant performance and are implemented in a dual differential configuration (each channel has its own DAC to process information). A sophisticated Two-Pole Dual Differential Double Virtual Earth Balanced Bessel filter configuration rejects virtually all noise and distortion present in the DACs and filters them to produce an unprecedented level of performance.
SELECTABLE DIGITAL FILTERS
The new DACs also feature a selectable digital filter with three settings to suit your own listening preferences and your own system:
- The steep roll-off filter exhibits strong attenuation of aliasing images outside the pass band (i.e. above 22.05kHz) at the expense of a little pre and post-ringing in the time domain.
- The linear phase filter uniquely features constant group delay which delays all audio signals at all frequencies by the same amount meaning all audio is fully time-coherent at output.
- Minimum phase meanwhile does not feature constant group delay but rather the co-efficients have been optimised without feed-forward so that the impulse response exhibits no pre-ringing in the time domain at all.