使用需要注意:如果用声卡做数字输入,设备音量可调的话,请把音量,波形,调整到中等,如果调到最大,那么声卡输出的失真也是最大,会引响性能.
●本机是由YULONG audio工程设计师:小龙历时4年时间开发设计出来的,解码芯片基于PCM179X在这期间不断改进调整优化电路,直至把本DAC发挥到最佳状态。
●PCM1798性能指标:
●THD:0。0005%
●Dynamic range:123DB
● Signal-to-noise ratio:123DB
● 本机声音特点:动态大,音场宽广深厚,分析力奇高,音色甜美,自然。搭配高档耳机或音响器 材,会让您享受到HI-FI的乐趣。
●本机在设计上采用的特研非常规技术:供电采用自行研制的T形RCR滤波网络(工作原理类似胆机CLC)每一部分的供电都独立分开,保证供电的纯度。以及声音的自然性模拟IV变换采用精心研制的由音频JFET名管组成的的IV变换魔块,并使用金属外壳进行密封,使用本模块能保证音色自然甜美耐听。
●数字信号输入进行了整行缓冲处理,能有效的改善输入信号的JITTER误码。
●供电采用定制的高性能EI变压器,这是保证靓音的基础,整流后由三只ELNA音频专用大容量电容(水塘)进行滤波,稳压之后由NICHICOM MUSE音频电容和高精度电阻组成的滤波网络,数字电路更是采用了9只仅有少数欧洲顶级音响上才少量采用的PHILIPS高速电容,电阻采用DALE和KOA高精度电阻,部分电路采用了西电高级电阻,
●本机采用的数字接受收芯片为74VHCU04,CS8414,解码芯片为PCM179X,IV变换为自行研制的魔块,输出采用OPA604,
●为了方便使用本机,特别为本机增加了高质素耳放,耳放采用大电流的JRC4560D电位器采用定制的台湾产电位器,本机同时具有模拟输出端子,供要求更高的用户连接耳放或音频功率放大器使用。
●具备有延时开机功能,及耳机保护功能,保证耳机及音箱的安全。
●机箱采用全铝,二次喷沙氧化,面板拉丝氧化处理,接线端子采用CMC高级镀金接线端子,使得本机在外观上就显示出高贵风范
●整机一体化设计,没有采用一条连线,保证信噪比的稳定性
●选配件有USB接口,可以方便的连接PC机笔记本电脑
●附,本机技术指标:
●标准输入接口,SPDIF,同轴,选配输入接口:USB-SPDIF
●输入频率:44.1,48,96KHZ/16/24BIT自动识别。
●信噪比:>110db
●动态范围:120db
●失真度:1KHZ%0.005
●额定输出:1.8VPP
●频率响应:20-20KHz-0.08db
●整机功率<10W
●机器体积:100*200*55mm
●重量:1.3Kg
●This audio device is designed and developed by YULONG Audio lead engineer, using not less than 4 years. This circuit of this PCM179x based digital analog converter has been improved, tuned and calibrated to make it performs at its best.
●PCM1798 perfomance figures:
●THD:0。0005%
●Dynamic range:123DB
● Signal-to-noise ratio:123DB
●Sound characteristics: great dynamic range, wide and deep soundstage, amazing details and sweet natural sound. Pair with high end headphones and audio components will let you enjoy the pleasure of high fidelity audio.
●The Minidac-A utilizing special designed non-conventional technique: power supply using self-developed T-shaped RCR filtering network (similar to tube amp CLC working theory), separate power supply section of each sections, to ensure power supply purity and naturalness of sound. Analog I/V conversion utilizing special developed I/V conversion module which comprise of audio grade JFET(Junction Field Effect Transistors). The module is completely covered by metal case. With this module, sweet natural sound can be ensured with no listening fatigue.
●Digital signal input gone through buffered shaping which can effectively reduce jitter.
●Power supply utilizing custom made high performance EI transformer which is the basis of beautiful sound. After commutation, 3 pieces of ELNA audio grade large capacitors will do the filtering. After voltage stabilized will go through the filtering network which comprises of NICHICON MUSE audio capacitors and high precision resistors. As much as 9 pieces of high speed capacitors were used on the digital circuit, such capacitors can only be found in a few European high end audio devices. Resistors comprises of DALE and KOA high precision resistors, some circuit uses the Western Electric high class resistors.
●The digital receiver of the MiniDAC-A comprises of 74VHCU04 hex inverter and CS8414. Digital analog converter is PCM179X, I/V conversion using self-developed JFET module, analog output stage using OPA604.
●The MiniDAC-A also conveniently include a high performance headphone amplifier. The amp uses high current JRC4560D. The potentiometer is custom made in Taiwan. The MiniDAC-A also has analog RCA output to connect to high end headphone amp or power amplifier for users who demand even higher performance.
●Featuring delay switch on capability and headphone protection, to ensure safety of your headphones and speakers.
●Full aluminium casing with double brush anodising treatment. The face plate has wiredraw anodizing treatment, The RCA connectors are CMC high end gold plated plugs. All these contribute to the classy physical appearance of the MiniDAC-A.
●Uniform design, without using a singple piece of wire to ensure the stability of signal to noise ratio.
●USB-SPDIF convertor is available as accessory. This facilitate easy connection with notebook/laptop users.
●Appendix: Technical specifications
●Standard input: Coaxial SPDIF, Optional input: USB-SPDIF
●Input sample rate: 44.1, 48, 96kHz/16/24BIT Auto detection
● Signal to Noise ratio:>110db
● Dynamic range:120dB
● Total Harmonic Distortion:1KHZ%0.005
● Rated Power: 1.8VPP
● Frequency Response: 20-20kHz-0.08db
● Total Power <10W
●Dimensions: 100x200x55mm
●Weight: 1.3kg |