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发表于 2018-12-7 10:18:51
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本帖最后由 zjzju 于 2018-12-7 10:37 编辑
有兴趣可查查HFN测试数据库.
benchmark的usb口比SPDIF+ap2界面的好。ap2可是很牛的一款界面。
https://www.computeraudiophile.c ... s-shootout/?page=15 有人跟这帖子：
I just removed my Audiophilleo AP2 from my system after upgrading from a Hegel HD10 to a Benchmark DAC2. With the Hegel HD10, the Audiophilleo, powered from an AQVOX linear PSU, made a huge, night-and-day really difference. With the Benchmark DAC2, the USB input (with a iFi iUSB) is very slightly superior to the SPDIF input, even when using AP2 on the SPDIF input----从Hegel HD10升级到Benchmark DAC2之后，我刚从我的系统中取出了我的Audiophilleo AP2。 使用黑格尔HD10，由AQVOX线性PSU驱动的Audiophilleo，制造了一个巨大的，日夜真正的差异。 使用Benchmark DAC2，即使在SPDIF输入上使用AP2，USB输入（带有iFi iUSB）也略微优于SPDIF输入
I extensively A-Bed the USB input of the Benchmark DAC2 against its coax SPDIF input fed by my AQVOX-powered AP2 (much alphabet soup in a single sentence, sorry), and I identified a small, but clear and stable, difference: the bass was a bit more precise through the USB input. The difference was just barely audible with my favourite orchestral test CD (Bartok's Wooden Prince by Boulez-CSO) but more noticeable (though still small) with my preferred bass-range test CD (Ralph Thamar Otentik - music from the French West Indies). In the medium range, at first I thought the AP2-fuelled SPDIF entry was a bit warmer than the USB input, but after quite some listening I had to acknowledge that it was because it was slightly less precise. One striking thing, for instance, is that, on another CD I know very well (Chambre Avec Vue by Henri Salvador), when listening to this disc from the USB input, for the first time I was struck by how old Salvador was when he recorded this CD. With the SPDIF input or my previous Hegel HD10 (also fed from its coax USB input with the AP2), his voice was a tad warmer and did not sound as old. In a way, it sounded nicer with the HD10 or the SPDIF input of the Benchmark DAC2, but the USB input is just more precise, more detailed, which is ultimately what I am after.---我广泛地将基准DAC2的USB输入A-Bed与由我的AQVOX驱动的AP2输入的同轴SPDIF输入（单句中很多字母汤，对不起），我发现了一个小而清晰且稳定的区别：通过USB输入，低音更加精确。我最喜欢的管弦乐测试CD（Bartle's Wooden Prince by Boulez-CSO）几乎听不到这种差异，但是我最喜欢的低音范围测试CD（Ralph Thamar Otentik - 来自法属西印度群岛的音乐）更加引人注目（尽管仍然很小）。在中等范围内，起初我认为以AP2为燃料的SPDIF入口比USB输入有点温暖，但在经过一番聆听后，我不得不承认这是因为它的精确度略低。例如，一个引人注目的事情是，在另一张我非常清楚的CD上（亨利·萨尔瓦多的Chambre Avec Vue），当从USB输入端听到这张光盘时，我第一次被萨尔瓦多录制这张CD的时候感到震惊。使用SPDIF输入或我以前的Hegel HD10（也可以通过它与AP2的同轴USB输入馈送），他的声音有点温暖，听起来并不老。在某种程度上，它使用Benchmark DAC2的HD10或SPDIF输入听起来更好，但USB输入更精确，更详细，这最终是我所追求的。
Thanks for this reference to this HFN test database, which is fascinating. I must say that I am quite surprised by the results for the DAC2 as, to me, the USB input sounds (slightly) more detailed than the SPDIF input fuelled by an Audiophilleo AP2. Interesting. Perhaps a difference of 20ps vs 10ps of jitter cannot be heard. Also, I noticed that the THD readings of the DAC2 are lower on the SPDIF input than on the USB input. But again they are so low that perhaps they are not audible anyway so that the difference does not matter, at least on my system. But in that case I should not have heard a difference between the SPDIF and USB inputs. When the DAC2 is used with the SPDIF input, the output level is somewhat higher (about 1dB on my system - I was too lazy to check voltages) than with the USB input. In principle this should not bias measurements, but who knows?--感谢您对这个HFN测试数据库的参考，这是非常有趣的。 我必须说我对DAC2的结果感到非常惊讶，因为对我来说，USB输入声音（略微）比由Audiophilleo AP2推动的SPDIF输入更加详细。 有趣。 也许无法听到20ps与10ps抖动的差异。 另外，我注意到DAC2的THD读数在SPDIF输入上比在USB输入上低。 但是它们又是如此之低，以至于它们可能无论如何都听不见，所以差别无关紧要，至少在我的系统上是这样。 但在这种情况下，我不应该听到SPDIF和USB输入之间的区别。 当DAC2与SPDIF输入一起使用时，输出电平稍高（我的系统大约1dB - 我懒得检查电压）而不是USB输入。 原则上这不应该偏向测量，但是谁知道呢？
我手上有一款dac3 b，真心不错，虽然只听了一会就带出门了，等新的电源线到了再细听。
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