求教线材和滤波电源插排取舍

zyzyzy3434

交易区新帖推荐

如题，小弟目前有一笔钱预算，但是不知道是选择取舍哪一个，是换一根USB的发烧级连接线（欧亚德D+ CLASS S或者PAD级别的，自身USB线中端，品牌就不说了），还是换一根同价位的发烧电源插排？对于整个系统的提升高？小弟是PCHIFI，如果换电源插排么就是插到解码和耳放。网上枪手文章好多，我实在难以取舍。目前有倾向换线材。麻烦各位大哥烧友给予好的建议了。谢谢，在线等大家的回答。

xqxrj

个人认为用好点的电源有效些

nicklv

估计早晚2个都得换。倒是建议你买二手比较好出的dd。玩线总要缴学费的。

GLIADIATOR

建议上这个，对于电脑USB供电的USB解码改善明显，我还拿来外接播放器的硬盘的电源用，也很给力，最关键的现在可以免费试用，而且是厂家还承担来回的顺丰快递运费，建议尝试一下，一淘搜索一下就有了。

[ 本帖最后由 GLIADIATOR 于 2012-11-29 12:16 编辑 ]

yamuling

可惜要多根usb线，我看到国外论坛的推荐，不过是香港人写的

GLIADIATOR

呵呵，很多资料都要翻墙去看，而且是英语，不过内地的定价比港币换成人民币贵些，还有用料确实很省，不过声音真得有一套。要省钱。就用贝尔金黄金版连接前面，好的线拖在后面最能发挥，不然都是贝尔金黄金版也行。

[ 本帖最后由 GLIADIATOR 于 2012-11-29 14:34 编辑 ]

amex

这个东西有大量lc电路保证波纹稳定，效果应该还可以的，至于地线隔离你就当笑话看看好了

amex

还有你usb接的是什么，如果是个小功耗的独立数字界面的话，建议上大容量电池，这是性价比最高的方案

GLIADIATOR

呵呵，不试不知道，接在外接移动硬盘和MX+都是给力的

GLIADIATOR

关于接地隔离工程师的回答
is the power supply galvanic isolated？ 11月6日上午 1:01

iFi Audio Not sure in which way you mean this? In order to keep compatibility with high speed USB2 (480MBps) to allow multi-channel use at high sample rates/resolution we cannot employ USB isolators. All current isolators are limited to 12MBPS or 2 Channels at 96KHz, which we felt was not acceptable for modern audio. So we cannot fully, galvanically isolate the DAC and PC.

However, full isolation is not strictly needed. USB Signalling is differential, so in theory only the two signal lines are required. In practice we need somehow a ground reference. If this ground reference comes only through the USB cable, all is well.

If there additional path through other equipment and mains wiring things become problematic.

So our "IsoEarth" feature allows breaking the ground connection in a way that is reliably safe for attached equipment (sorry to be vague, but we consider the precise method a "trade secret") and does not require "earth lift" or "cheater" plugs.

As we also interrupt the power line from the computer and substitute our own super regulated very low noise supply from the Computers power we essentially only leave the two USB signal lines active and connecting between PC and DAC is IsoEarth is engaged.

I have measured differences in of around ten times (20dB) with IsoEarth engaged in systems we use for testing - that is they are already quite well treated regarding the ground noise problem!

When testing a USB Isolator marketed for Audio in the same setup I observed similar gains in ground noise levels as with the iUSBPower, suggesting that in our system at least breaking the ground line and full isolation perform comparable, objectively. I did observe that the 5V output from the USB Isolator was quite noisy due the use of an isolating DC-DC converter, which basically a small switched mode supply.

Sorry for the lengthy missive, but it is not a simple subject.