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The SDR-4000SL Reference CD Processor is a limited edition reference instrument crafted in the Spectral engineering department and individually programmed and calibrated by its designer Keith Johnson. Relatively unlimited time and resources have been utilized to achieve our ultimate objective: Engineer the most sophisticated and sonically accurate CD player in the audio industry. Those that are familiar with Keith Johnson’s credentials and previous achievements in digital design know this objective is not taken casually or an idle boast.
OVERVIEW
Great condition pre-owned Spectral SDR 4000-SL CD Player.
Unit comes with original box, packaging, power cord, remote, and manual.
Rated 8/10 for minor cosmetic wear consistent with age and use.
This unit was part of a system played exclusively with MIT cables.
The SDR-4000SL Reference CD Processor is a limited edition reference instrument crafted in the Spectral engineering department and individually programmed and calibrated by its designer Keith Johnson. Relatively unlimited time and resources have been utilized to achieve our ultimate objective: Engineer the most sophisticated and sonically accurate CD player in the audio industry. Those that are familiar with Keith Johnson’s credentials and previous achievements in digital design know this objective is not taken casually or an idle boast.
As with previous editions of our SDR components from the 1980s and 1990s, such as the SDR-1000 and SDR-2000 reference digital components, it takes our engineers multiple design generations to arrive at the final and ultimate model. The SDR-4000SL has been previously produced in two highly regarded versions, the original SDR-4000 and the revised SDR-4000 Pro which incorporates the exclusive HDCD “Long Filter” technology. It has taken Spectral engineers four years more to develop the final and most uncompromising generation, the SDR-4000SL. In the SDR-4000SL, Keith Johnson and the design team address their remaining performance objectives to create the ultimate SDR-4000 and redefine the possibilities of the redbook CD medium in the finest music systems.
The SDR-4000SL Reference CD Processor is Spectral’s ultimate compact disc player, completing the Spectral Digital Reference system begun with the SDR-2000 Digital Processor. The development program for the SDR components was initiated over 15 years ago with the introduction of the Spectral SDR-1000 Reference Disc System, the industry’s first truly high-end compact disc playback system. The innovative SDR-1000 was years ahead of its time, pioneering fundamental processing breakthroughs such as balanced decoding and conjugate correction filters. More recently, the ambitious SDR-2000 Professional Processor has stunned the audio industry with its technical advances and resolving power. Sharing its uncompromising circuit architecture with the historic HDCD recording system by Pacific Microsonics, the Spectral SDR-2000 is widely considered to be the finest digital processor available as well as the acknowledged reference for High Definition Compatible Digital recordings.
The arrival of the SDR-4000SL Reference CD Processor culminates the SDR program at Spectral and achieves the final integration of our high resolution digital technology. Supporting the challenge are new generation component technologies and state-of-the-art test systems to push forward the envelope of digital audio performance. Like other Spectral SDR components, no detail or expense has been spared in the SDR-4000SL to achieve the status of a true reference.
SPECIFICATIONS
- Sample Rate: 44.1KHz
- D/A Conversion: Four custom 24 bit DACs in double balanced configuration
- Digital Filter: 8x oversampling, 56 bit math 64 bit accumulator HDCD
- Analog Filter: Passive type, fully discrete . Linear phase to 28KHz
- Frequency Response: DC to 22KHz +/- .3 dB
- DAC Step Resolution: Better than 120dB
- Digital Noise Output: 100 uV peak to peak or less
- Transient Overshoot: 8% or less
- Transient Settling Time 100uS or less @ 1%
- Intrinsic Jitter: 1 picosecond rms or better, 3-4 picoseconds peak
- Outputs: RCA single-ended
- Output Impedance: 100 Ohms
- Frequency Response: DC to 1.2 Mhz -3 dB
- Harmonic Distortion: Less than .001
- Intermodulation(SMPTE): Less than .001
- Nominal Output: .75 Volt rms
- Output Voltage Swing: 2.5 Volts rms maximum
- Signal to Noise Ratio: Greater than 120 dB
- Channel Separation: Better than 115 dB
- Slew Rate: 250 V/us
- Voltage: Factory set 120, 220, 240 VAC @ 47.5 Hz to 440 Hz
- Continuous Dissipation: 65 Watts
- Disc Loader: Slot load, custom designed, MIL spec.
- Pickup: Objective lens drive type with 3-beam laser pickup linear drive servo
- Wow & Flutter: Below measureable limit (accuracy of crystal)
- Dimensions: 48cm (19") W, 10.5cm (4.25")H, 40cm (16")D
- Weight: 20.9 KG (46 lbs.) net
ADDITIONAL INFORMATION
Please call 734.662.3595 and ask for Richard if you have any questions about this product.
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