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SABRE D18采用的是目前世界最高性能的32位音频DAC ESS9018作为DAC解决方案，
ESS9018的32BIT HyperstreamTM DAC 专利结构，和时域抖动消除技术，以及具有135dB的动态范围和-120dB的失真度，为当今业界最高性能水平，SABRE D18已充分发挥此芯片之实力,以其极高的性能,足以能满足最苛刻的音响发烧友!
SABRE D18选用 加拿大plitron品牌高性能,低漏磁变压器供应整机的动力。用多组2次稳压提供极低噪声的电源供给DAC数字信号电路，采用精密高速侍服稳压电源为DAC模拟电路供电，用价格昂贵的精密高性能运放AD8620为IV转换，使用同样价格昂贵的精密高性能运放AD797为LPF滤波处理。采用DALE军用规格精密电阻，选用WIMA的多种规格的薄膜电容，经过全人工挑选配对后做为LPF使用，TPC薄膜电容作为退耦，和松下FC电解电容电容做电源滤波。
作为时钟抖动消除的基准源晶振，我们定制了极低相位噪声的晶振来供SABRE D18 使用，PCB板则是多次试制，优化布线，以达到最佳性能和听感。例如数字信号传输布线，为了得到最佳的信号质量，没有直接从PCB上面走线，而是经过继电器机械式就近对输入信号进行切换选择后，采用SMA接口传输线来进行传输。以保证信号输入到ESS9018的过程中全程阻抗匹配，得到最佳性能的传输。
外壳则采用铝合金模具拉伸成型，加厚的材料，小体积的设计：（250*190*50mm）精工细制的表面处理工艺。（本机体积和钰龙韵SABRED系列产品搭配兼容，例如SABRED A18耳放和SABRED A10功放）
选用材料只不过是品质的保证，电路调试和设计才是最终体现出机器素质的要点，钰龙韵凭借多年积累的DAC产品研发经验来设计本机，并借助数字音频分析仪，频谱仪，宽频示波器，高精度万用表等用来分析研究SABRE D18的基本性能指标，调试机器的参考电压，分析数字信号和电磁兼容性测量。经过长时间的调试，本机已发挥出接近ESS9018的极限性能。
SABRE D18 不仅有极高的性能指标，它同时还具有较为耐听的听感，调音工作是由钰龙韵的调音团队（由多名资深音响音乐爱好者组成）的协作下经过长时间调校完成，SABRE D18所表现的音乐具有丰富感情色彩和神韵。它声音风格大气而不粗犷，高频解极高，却表现得柔润细腻，中频饱满，低频下潜恰到好处，一点也不拖沓。高，中，低三频整体均衡衔接自然。
警告：可选择电压切换（使用工具切换100V-120V/220V/240V/50HZ/60HZ）使用前请注意电压设置正确。否则因人为设置错误电压烧毁不与保修。电源输入/电源开关/可更换保险丝座（内藏一只备用保险丝，如果保险丝溶断，可使用工具取出替换）
The DAC solution of the SABRE D18 we used is the 32-bit audio DAC ESS9018 which represents the highest performace in the world.(With ESS patented 32-bit HyperstreamTM DAC architecture and Time Domain Jitter Eliminator, the SABRE32 Reference Stereo DAC delivers an unprecedented DNR of up to 135dB and THD+N of -120dB, the industry’s highest performance level that will satisfy the most demanding audio enthusiasts.)
After a long time of the R&D regardless of the investment cost,Yulong Audio worked out the product with high performace and good sense of hearing which uses the ESS9018 as the main controll unit.
The SABRE D18 uses the high-performance transformer with low magnetic flux leakage whose brand is PLITRON from Canada as the driving force. The DAC digital signal circuit uses the extremly low-noise power through the multiple groups of the secondary voltage-stabilizing.The DAC analog circuit uses the high-speed and precise servo voltage-stabilized source.The IV conversion uses the expensive,precise and high-performance op-amp AD8620.The filter processing of LPF uses the expensive,precise and high-performance op-amp AD797.The precise risistances with military specification use the DALE.The film capacitors with multipe specifications use the WIMA.They are selected to match to be used in the LPF.The TPC film capacitor is used as the decoupling and the Panasonic FC electrolytic capacitor is used as the power filtering.
The benchmark source crystal that is used to eliminate the clok jitter is customized by the crystals manufacturer and its phase noise is very low.In order to achieve the best performance and good sense of hearing,the PCB has been tested for many times to optimize the layout.For example,to obtain the best signal quality,the layout of the digital signal transmission is not directly placed in the PCB, the transmission line of the SMA interface is used as the transmission.
The SABRE D18 has a small size(250*190*50mm).The shell of the SABRE D18 uses the aluminium alloy mould to stretch the forming and the thicken material.It uses the fine surface treatment technology.(The volume of the SABRE D18 is suitable and compatible with the other SABRED products made by Yulong Audio,such as the headphone amplifier SABRED A18 and the power amplifier SABRED A10.)
The material selected is nothing but an assurance of the quality,the debugging and designment of the circuit can finally represent the essential of the high quality.The designment of the SABRE D18 is based on our rich experience of the DAC development. With the help of the digital audio analyzer,Universal Table,Spectrum Analyzer,Broadband oscilloscope,and the other equipments,we can analyze the basic performance index of the SABRE D18,debug the reference voltage ,analyze the digital signal and measure the electromagnetic compatibility .After a long time of debugging,we believe that the SABRE D18 can play close to the limit performance of the ESS9018.
The data is just data, it comes from a soulless machine which has no idea on music In order to move from the cold solid data to touching music playback, we must make acoustical adjustment through hearing test, using the sense of our experience.
Yulong Audio has its own acoustical tuning team that is made up of acoustic engineers, senior audio fanciers and experienced music lovers. With their extensive listening tests and fine tunes, the SABRE D18 is able to play back music with rich emotional elements and graceful charm, give an elegant listening impression.
Although the SABRE D18 has an extremely extended high frequency response, the voice is no where from harsh but soft and delicate. Combine with it’s full and vivid mid range, and well managed bass, the playback is well-balanced, natural and smooth, it gives the evidence that SABRE D18 is a high-performance DAC with an extreme pleasure of listening.
Warning Please make sure the voltage selector is set to proper position that can match the actual power supply voltage. Otherwise this DAC might be permanently damaged! Under such circumstance, the warranty is void.
Technical Specifications of SABRE D18
Inputs: Optical, Coaxial,, AES/EBU
Input Digital Signal Format: 32-192KHz, 16/24/32 Bit auto detection.
SNR: -130dB.
Dynamic Range: 130dB.
THD+N: <0.0003%
Frequency Response: Unbalanced: 20-30KHz-0.1dB Balance: 20-20KHz -1db
Power Consumption: <20W.
Dimensions: 250*180*55mm.
Net Weight: 2.3Kg
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发表于 2011-10-31 13:24
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