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D100是由钰龙韵电子有限公司精心研发的一部高精度音频解码器，它具有丰富的接口、优秀的性能、小巧的体积，可以方便的组合成个人高保真音频娱乐中心。
输入：本机的数字音频输入包括：光纤，同轴以及平衡接口，可连接大部分输出PCM编码数字音频信号（最高支持24Bit/192KHZ格式）的音频设备，例如CD，DVD或者声卡（某些情况下可能要特殊的连接线，例如BNC-RCA数字音频线）
而它的USB输入则可作为USB音频解码器使用，兼容Windows 7，Vista，XP，MAC OS，或者LINUX操作系统。通过面板按键切换可以选择输入设备。
输出：本机背板的线路模拟音频输出包括非平衡的RCA接口以及平衡的XLR接口，可联接各类放大器和有源音箱；面板上的耳机输出接口可联接16-600欧姆的各种耳机。
注意！！！！线路模拟音频输出并不受面板的音量旋钮控制，而是固定在最大电平。所连接的器材必须具有音量控制，否则可能严重损坏所连接的器材以及听众的耳朵。本公司对此一概不予负责。
本机特点：
● 严谨的设计，充分的试验以及业界领先的测试器材带来非凡的效果：具有小于0.0005%的总谐波失真+噪声水平，130dB的闲置噪声，以及120dB的信噪比。
● 采用了异步采样转换（ASRC）技术，抗抖动能力强。原理是数字音频信号输入到本机后经过一个特别定做的1PPM精度，低相位噪声的时钟作参考，进行高达132KHZ的异步采样率转换后提供精确的，低抖动的I2S数据供给解码器处理，使解码的精度提高，以减少输入的数字信号对音质的影响，而大大的降低对前端的要求，配合各种质量的前端器材都可以充分发挥本机的性能。经过测试，在数字输入信号加入80ns抖动后对本机性能影响轻微，而作为对比的一个不带ASRC的DAC已经不能正常锁定而无法正常工作。
● 选用成熟可靠的模拟线路，配合经过反复测试比较之后选用的运放及其他零件，将声音调整至温暖厚实，细腻的风格。整体听感为解析力高，动态大，音场宽广。
● USB接口使用广泛使用在高级器材上的TI公司TAS1020B，其从USB输出的I2S信号供ASRC处理再进行解码，可达到与同轴，光纤，平衡输入相同的性能指标：总谐波失真+噪声小于0.0005%
● 具有声音风格切换的高性能耳机放大器，通过面板的Sound按键切换声音风格，默认常用模式为Sound MODE1，声音通透而动态好。切换到MODE 2则是柔和模式，适合高频比较亮的耳机，或者喜欢略暗高音的听众。
● 两组不同阻抗的耳机输出接口。低阻抗耳机接口（LOW）适合高灵敏度低阻耳机，如入耳式耳塞。高阻抗耳机接口（High）适合大多数头戴式耳机，方便搭配使用各种耳机。也可以通过不同的接口得到风格略有不同的声音。
● 通过面板MODE键可以进行便捷的操作，输入通道自动记忆可以自动恢复关机前选择的通道，让您欣赏音乐变得更轻松！
● 铝合金精工细制的机壳，量身定制的高品质镀金接插件，带来精细的操作手感，优异可靠性以及稳固的连接
● 全球通用：可以在背板选择工作电压为110-120V，或者220-240V。
机器工作结构如图:
开发历程：
钰龙韵电子在设计上以各种测量仪器测试指标为基础，历经7次改版打样试制，设计出具有高性能指标的D100，在调音上则采购了大量的高品质元器件进行调试互换搭配，反复的试听修改，一步步优化，声音达到更容易让大众接受的具有丰富的音乐感的效果。
元器件和工艺全部只使用声音表现最合适的，性能表现最佳的产品，例如09型电位器一项，我们就购买了数十种样品，最终挑出手感最好，平衡性最佳的ALPHA，变压器选用加拿大Plitron品牌产品，机器上每一个元器件都历经数十次调整测试，试听，最终才确认定型！
D100不仅是一部高性能指标的机器，也不止是一部采用发烧元件堆料堆起来的机器，它是一部精心设计/调校，具有超高素质和优秀的听感的产品。
功能操作说明：
1 LCD显示屏，显示输入输出和音效状态。
2 输入选择，轻按操作，光纤，SPDIF，AES/EBU，USB循环切换
3 耳放放大器音效选择，默认为sound mode：1 轻按两下切换至sound mode：2
4 低阻高灵敏度耳机接口：可联接耳塞或低阻抗高灵敏度的耳机
5 普通耳机接口：适合常用hi-fi耳机
6 音量控制，调节耳机放大器音量。
警告：联接耳机前，请注意音量关至最小，以免过大音量损坏听力！
7 非平衡模拟音频输出，可联接耳机放大器驱动耳机或高保真功放驱动音箱。
8 平衡模拟音频平衡输出，可接平衡放大器驱动耳机和音箱，或高保真有源音箱
9 SPDIF输入，可联接CD/DVD/DAT/声卡等音频播放器数字输出接口
10 光纤输入，可联接CD/DVD/DAT/声卡等音频播放器数字输出接口
11 AES/EBU 数字平衡输入，可联接专业音频器材数字平衡输出
12 USB输入，用于联接台式机，笔记本电脑USB接口。
警告：请勿连接在USB HUB，或台式电脑前面板USB接口，接这两类接口，USB干扰较重，发挥不出最佳的音效！使用USB接口联接本机时,请不要同时使用USB移动硬盘,USB移动光驱,等大量通过USB传送数椐的设备
13 电压切换（使用工具切换100V-120V/220V/240V/50HZ/60HZ）
警告：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。
14 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）
使用PC联接本机：USB接口接入本机，打开电源，PC系统能自动识别并安装软件，前面板INPUT按键切换至USB in， 前面板耳机接口联接耳机，或后面板联接功放，调节至合适音量，即可欣赏音乐。
建议: 使用USB联接本机，将播放软件的设置改为24BIT/96K时效果更好）
CD/DVD/声卡等其它数字音频设备，数字输出接口可联接本机对应接口，通过面板INPUT按键选择到相应的输入通道，其它操作和PC联接相同。
建议：使用本机耳机输出接口，同时也使用RCA和平衡输出接其它设备时，其它联接的设备必需在通电开机状态下，才可同时使用。（有些设备关机状态下输入通道是直接对地短路的，相互之间会有影响）
附，本机技术指标：
•输入接口：SPDIF同轴，SPDIF光纤，平衡，USB
•输入频率：32-192KHZ/16/24Bit自动识别(USB最高支持24Bit/96KHz)。
•信噪比:>120dB
•动态范围：115dB
•失真度加噪声:1KHZ时小于0.0005%
•额定输出:2VPP
•频率响应:20-20KHz-0.16dB
•整机功率:20W
•耳机输出功率：130mW于300欧姆下，900mW于32欧姆下
(测量时外壳接交流地线).
•机器体积：250*180*45mm
•净重：1.5KG。运输重量视包装而定。
Carefully designed and manufactured by ShenZhen YuLong Electronics Co. Ltd., the D100 is a high-precision audio decoder. Thanks to it’s plenty interface, excellent performance and small size, it is very convenience to integrate into your Hi-Fi system.
Inputs:
The digital input includes Optical, S/PDIF and AES/EBU, which can connect to most of the equipments with PCM digital audio signal up to 24bit/192KHZ, such as CD, DVD or sound card.
By selecting USB mode by pushing the INPUT button on the front panel, this DAC can be used as a USB sound card, and supports WINDOWS 7, VISTA, XP, MAS OS and LINUX.
Outputs:
The unbalanced RCA coaxial line level output and the balanced line level XLR output on the back panel can connect to amplifiers or active speakers. And the Headphone output on the front panel can connect to headphones with impedance from 16 to 600 Ohms.
WARNING!!!! Both of the RCA and XLR line level outputs are NOT controlled by the Volume knob on front panel, and as always in full output level. Any equipment connected to these outputs must has a proper volume control, otherwise might be damaged. It might harm the hearing of audience too. We are not responsible for any kind of such results.
The Features:
● Sophisticated design, adequate test and leading test equipments ensure outstanding result: THD+N<0.0005%, -130dB idle noise and up to 120dB SNR.
● By implementation of ASRC, we have achieved an excellent anti-jitter performance. The input digital audio signal is ASRC processed to 132KHZ with reference to a custom made, 1ppm precision and low phase noise clock source. The output is an extremely low jitter I2S signal to feed into the DAC chip. That results in a very precision digital to analog convert process and not sensitive to input signal quality. So a stable result is maintained within different of front end equipment. In our test, when the input digital signal is added 80ns of jitter, this DAC can produce almost same performance as when there is no jitter added, while another DAC in comparison which is not implemented with ASRC already lost the lock to the signal and cannot work.
● Carefully designed analog circuits, together with the long time listening compared components, bring to the neutral and fine textured sound quality. In general, the DAC is high resolution, extended dynamic and with an extensive sound image.
● The USB input is feed toTAS1020B, a chip with high reputation from Ti, which is widely used in Hi-end equipments for USB solution. The I2S signal from this chip is sent for ASRC then DAC. Thus an equivalent result from USB is achieved, as S/PDIF, Optical or AES/EBU inputs: The THD+N <0.0005%.
● This DAC carries a high performance headphone amplifier, and sound style is selectable by pressing the Sound button on the front panel. The default style Mode 1 is natural and dynamic. Switching to Mode 2 will result in a smooth style, which is suitable for bright headphones, or if you prefer more “dark and smooth” sound.
● Two headphone outputs with different impedance: LOW is suitable for headphones with low impedance and high sensitivity such as in ear monitor; while HIGH fits most of bigger headphones. You can also try to get a different sound style by using a same headphone in different outputs.
● Easy operation: Most likely you only need to access the MODE button on the front panel. The last used input channel is stored automatically and will resume when power up. So plug and play your music.
● High quality aluminum housing, custom made gold plated connectors result in a flawless operation, a robust connection and a superior reliability.
● Whether you anywhere: You can select 110/120V or 220/240 operating voltage.
The structure is as follows:
The development course:
Based on the specifications of all kinds of the testing instruments,after seven times of correcting,sample making and trial production, YuLong Electronics designed and completed the D100 with high performance index.In order to get the best results of the sound that is easy to be widely accepted,we used a lot of high-quality components to debug frequently, test repeatedly and optimize step by step.
All the components and the craft we used must meet that the sound performance should be the most appropriate and the property should be the best.For example,the potentionmeter of 09 type,we have bought dozens of samples,finally we choose the ALPHA that its feel and balance are the best.The transformer we used is the Plitron brand from Canada.Each of the components has gone through dozens of adjusting, testing and audition before we decide to use it.
The diagram of using:
Operating instructions:
1 LCD display, shows the input, output as well as the sound mode
2 Input selection: Press to select input from Optical, S/PDIF, AES/EBU and USB.
3 Sound mode selector: Mode 1 is default setting, and switch to Mode 2 by a double press.
4 LOW Headphone output: To connect low impedance and high sensitivity headphones.
5 HIGH headphone output: To connect a normal high impedance headphone
6 Volume control: To control the level of headphone out.
Warning! Please set volume to minimum before connecting a headphone, to avoid damage your headphone as well as your hearing!
7 Unbalanced Analog Audio Output, to connect a headphone amplifier to drive headphone, or a power amplifier to drive the speakers.
8 Balanced Analog Audio Output, to connect amplifiers or other equipments with balanced inputs.
9 S/PDIF Input, to connect digital source with an unbalanced output, such as CD, DVD, DAT or sound card.
10 Optical Input, to connect digital source with an Optical output, such as CD, DVD, DAT or sound card.
11 AES/EBU Digital Input, to connect digital source with a balanced output.
12 USB Input, to connect to a USB socket on a computer
Warning: Connect this DAC via an USB HUB, or via USB interface on the front panel of a desktop computer, might seriously degrade the sound quality, due to more interference!!!
13 Voltage selector: Use a tool to select suitable voltage.
Voltage can be set to 110-120V, and 220-240V, 50 or 60HZ.
Warning! Please make sure the voltage selector is set to proper position that is match the actual power supply voltage. Otherwise this DAC might be permanently damaged! Under such circumstance, the warranty is void.
14 Fused Power socket. There is a spare fuse in it that can be used when necessary
Connect to PC via USB: connect this DAC to a USB port of a PC via a USB cable, and the PC will automatically recognize it as a USB sound card. You may need to set the output sound device in your playback software manually. Then select USB input from the DAC’s front panel. Then start enjoying the music.
We recommend setting the output format to 24Bit/96KHz in the playback software for better result.
To connect other inputs: Connect the devices via a proper cable, and select the corresponding inputs from the Input button on the front panel of this DAC.
D100 Technical Specifications:
•Inputs: Optical, Coaxial, USB, AES/EBU
•Input digital signal format: 32-192 KHz, 16/24 Bit auto detection. USB supports up to 24Bit 96KHz
•SNR: >120dB.
•Dynamic Range: 115dB.
•THD+N: <0.0005% at 1KHZ
•Frequency response: 20-20KHz-0.16dB.
• ower consumption: <20W.
•Headphone output power: 130mW at 300Ohm, and 900mW at 32Ohm
Chassis to connect AC ground test
•Dimensions: 250*180*50mm.
•Net Weight: 1.5Kg
•acking Size: 300 * 300 * 100mm
Include in the packaging: This DAC, user manual, USB cable. Power cable
Note: One year free warranty. The warranty is void, if the DAC is opened not by us.
技术更改通知:由于环保封装的AD1955支持132KHZ*256FS的采样率下稳定性不良,异步采样率更改为110KHZ*256FS
Technical change notification: sampling rate 132KHZ modified to: 110KHZ
另付通电状态图片,
以及西装搭配A100图片,
和电路板批量测试中图片.
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