本帖最后由 xy1689 于 2019-8-21 13:02 编辑
他就是不想让你看到太直观的，包括他的评论也都在闪烁其词。soundstage就没那么留情了。soundstage的测试是最准的，因为是在加拿大国家声学研究中心测的。另外每本德国杂志都有测量的，不然你以为买杂志就是看忽悠吗。目前抛去功率不看，测试最牛的功放是ahb2。https://www.stereophile.com/content/benchmark-media-systems-ahb2-power-amplifier-measurements
不过这是有作弊成分的，参见：
This amp is designed to show good THD+N on the AP test you can't correlate this measurements to the other amps tests in stereophile because the amp has no gain it puts AP generator/analyser in the low distortion field if you loopback AP2 you will see that from 10-500mvRMS has 0.015-0.0004 THD+N if you add 23db gain to that line the amp that has no distorion has to have THDvsPower graph line from 0.003-0.0003 downward slope strait line from 100mW to 30Watts then flatten's out toward 100 Watt on 80kHz bandwidth, if put the analyser in 20kHz bandwidth the line will be lower but still the same shape like this http://www.hardwareanalysis.com/images/articles/large/12004.gif http://www.hardwareanalysis.com/images/articles/large/12003.gif http://www.hardwareanalysis.com/images/articles/large/12005.gif as is measured on a class a amp with lower distortion then AHB2 and when you crank the volume control on the pre-amp to compensate for the low gain you will amplify the noise of the DAC or Phono-pre up to levels of the other amps so low noise in the AHB2 is just red herring if you lower the designed gain of any amp the noise gets lower as well. PS. To John Atkinson you cant measure AES48 compliant device's noise by shorting it to the GND you will pickup noise from the enclosure, you need to short out the signal wires or put a resistor between them.
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楼主
发表于 2019-8-21 12:32:47
