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发表于 2010-5-2 15:31:21
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原帖由 lkpkp 于 2010-5-2 15:14 发表 
转一个此贴在R33讨论中的回复：Hello all Sunday morning,
＞How come this audiophile in Mainland China is so quick!?
The first 3 DAC202 pre-ordered users are all from China around November 2009. They have waited almost 6 months for delivery.
http://www.asiaweiss.com/main/?p=1591
We do not have any magazine review yet. The first 202 demo set is now in Audiotechnique magazine waiting for photo shooting for media propaganda.
Avbuzz posted a photo review. The photos are excellent and disclosed the internal structure of the new DAC and new analogue output stage, comparing to Minerva. The owner of this DAC202 Mr.Redman waited so long as he wanted to buy a Minerva, which is discontinued.
http://www.avbuzz.com/audio-video/201004/weiss/0.htm.
＞This Mainland audiophile only tested the DAC202 as an ordinary DAC but did not test it as a firewire DAC.
The testing methodology is incorrect. I asked this China DAC202 user too. When they compare the DAC202 with dCS Elgar, the dCS Elgar is locking at 24/88.2kHz and while the DAC202 is locking 48kHz. If they are playing CD, then the XLR lock of DAC202 should be 44.1kHz. It is not really valid test to me. They actually should hear strange noises, I wonder why.....
＞ he just bought the dac for 2 days, not yet run-in......
Of course Vash knew this. From all the first shipment owner reports, the DAC202 improves dramatically during run-in. We all guess that the Coil (similar to Medea) needs longer time to get in shape.
Which is better? Firewire, AES, SPDIF, TOSLINK?
Firewire is ONLY used for computer as source CAS. When using CAS, firewire connection is most straight forward and recommended approach because there is only 1 clock in the chain and that is the DAC202. (Same case applies to DAC2/Minerva/INT202). The DAC202 controls the binary data flows from computer to DAC. Many reviews use this great CAS master clock concept to explain as firewire is better connection than AES, SPDIF, is not entirely correct.
When using AES or SPDIF, the DAC202 can slave to the digital input, or from WordClock input. However it cannot work with internal sync hence the source is from CD/DVD/SACD transport.
While using Firewire, the DAC202 Sync can slave to any digital or WordClock input, or work as internal master sync. If you think the AES or Toslink is better as master sync, it is very flexible that to use firewire as data connection and select Sync from AES or Toslink. The timing will then be controlled by the AES/Toslink input.
Some audiophiles see Wordclock means using external clock on WLK input, but not another way around that WLK output can be master. The DAC202 WLK output can be used to sync with other transports (e.g. Studer A730) which has wordclock input. By this way, the DAC202 can work in master clock mode while Studer A730 slaves to the DAC202. This method is effective and applies on other company products such as Wadia and dCS master clock mode.
＞ any idea how practricle it is as a preamp?
It serves as digital preamp for digital sources including CAS.
＞ No good. 0DB is the best
We disagree. The digital preamp section is at least 32bit design. With a simple explanation, when you are listening to CD (16bit) you have another 16bit resolution. Each 1 bit resolution equals to 6dB, you can turn down the volume 16 x 6 = -96dB without touching the data. If you are playing 24bit source (CAS), then you have 8bits x 6 = -48dB without touching the data. And since we used properly dithered volume control, that should be a good volume knob. People in the professional audio industry actually using Weiss processors as volume up/down with better results in CD/DVD-A/SACD mastering.
Daniel wrote a paper with sound samples which I recommend: http://www.weiss-highend.ch/comp ... l_Level_Control.pdf
照片仅仅是为了Photo taking，
实际测试的时候，我们都是P70 VUK 2倍升频输出，24bit/88.2KHz；
由解码提供时钟信号，同步转盘（转盘确认收到）。
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楼主
还记得隔壁混混长老在他的丹拿声学M3大箱子系统上，SONY低端蓝光机+WEISS DAC2 ,让他出了5万级的音源ayre c-5xe.
