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发表于 2017-8-21 10:34
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本帖最后由 edithli 于 2017-8-21 10:51 编辑
今天继续与大家分享,上次的两台DAC——一台某声发烧双PCM63的古董厂机、一台朋友自己设计的一体机的业余条件下的客观测试结果,
测试软件改用:RMAA测试,版本6.4.1。RMAA测试给出具体的数值,直观;其测试结果与AudioTester的测试,总体比较一致。
软件测试的客观数据结果,不是评判声音的唯一,却能真切地帮助我们将主观听感从无形化为有形,帮助我们更好地理解和研究声音,并在制作和调试中,系统考量并有的放矢。这是一种方法论。
先细述主观听感:
发烧双PCM63的古董厂机:具有较明显的R2R架构转换器声音特点,动态强烈,大气磅礴,初听华丽惊艳,长听则感此声富丽堂皇,应接不暇,听者略觉辛苦。另外,我的一位女烧友形容:这个声音像男人,有一种刚强的感觉。(这与厂机的品名不谋而合,你们猜到了吗?哈哈哈哈~~)
朋友自己设计的一体机 :声音比较自然真实,虽然不如古董厂机那么华丽张扬,但是独具亲和力。声音特质质朴温和,能够比较好地表达更广泛的音乐类型和作品,能让听者毫不费力地自然地融入其中。非常地舒适,耐听易听。
好啦,接着与大家分享RMAA的测试结果。数据差异明显,与主观听感相应,一定程度上说明问题,相信大家一样能得到到有趣和有益的启发。
首先上两个总表~~RMAA自动导出滴~
G1-发烧双PCM63的古董厂机 SummaryFrequency response (from 40 Hz to 15 kHz), dB | +0.18, -0.02 | Very good | Noise level, dB (A) | -86.6 | Good | Dynamic range, dB (A) | 88.9 | Good | THD, % | 0.0071 | Very good | THD + Noise, dB (A) | -79.3 | Average | IMD + Noise, % | 0.016 | Very good | Stereo crosstalk, dB | -88.0 | Excellent | IMD at 10 kHz, % | 0.013 | Very good | General performance |
| Very good |
G2-朋友自己设计的一体机 SummaryFrequency response (from 40 Hz to 15 kHz), dB | -0.01, -0.24 | Very good | Noise level, dB (A) | -114.6 | Excellent | Dynamic range, dB (A) | 114.5 | Excellent | THD, % | 0.0007 | Excellent | THD + Noise, dB (A) | -100.1 | Excellent | IMD + Noise, % | 0.0009 | Excellent | Stereo crosstalk, dB | -113.0 | Excellent | IMD at 10 kHz, % | 0.0009 | Excellent | General performance |
| Very good |
接着是详细的图表
P11-双PCM63的古董厂机-cross
P12-双PCM63的古董厂机-dynamics
P13-双PCM63的古董厂机-fr
P14-双PCM63的古董厂机-imd
P15-双PCM63的古董厂机-imdswept
P16-双PCM63的古董厂机-noise
P17-双PCM63的古董厂机-thd | P18-朋友DIY一体机-cross
P19-朋友DIY一体机-dynamics
P20-朋友DIY一体机-fr
P21-朋友DIY一体机-imd
P22-朋友DIY一体机-imdswept
P23-朋友DIY一体机-noise
P24-朋友DIY一体机-thd |
P11-双PCM63的古董厂机-cross
Stereo crosstalk
| Left | Right | Crosstalk at 100 Hz, dB | -91 | -88 | Crosstalk at 1000 Hz, dB | -88 | -86 | Crosstalk at 10000 Hz, dB | -85 | -84 |
P12-双PCM63的古董厂机-dynamics
Dynamic range | Left | Right | Dynamic range, dB | +84.4 | +87.2 | Dynamic range (A-weighted), dB | +87.7 | +90.1 | DC offset, % | -0.00 | -0.00 |
P13-双PCM63的古董厂机-fr
Frequency response | Left | Right | From 20 Hz to 20 kHz, dB | -0.02, +0.35 | -0.39, -0.05 | From 40 Hz to 15 kHz, dB | -0.02, +0.18 | -0.12, -0.05 |
P14-双PCM63的古董厂机-imd
Intermodulation distortion | Left | Right | IMD + Noise, % | +0.0176 | +0.0136 | IMD + Noise (A-weighted), % | +0.0128 | +0.0104 |
P15-双PCM63的古董厂机-imdswept
IMD (swept tones) | Left | Right | IMD + Noise at 5000 Hz, | 0.0129 | 0.0110 | IMD + Noise at 10000 Hz, | 0.0129 | 0.0115 | IMD + Noise at 15000 Hz, | 0.0135 | 0.0131 |
P16-双PCM63的古董厂机-noise
Noise level | Left | Right | RMS power, dB | -82.7 | -85.4 | RMS power (A-weighted), dB | -85.4 | -87.8 | Peak level, dB FS | -67.1 | -70.4 | DC offset, % | -0.0 | -0.0 |
P17-双PCM63的古董厂机-thd
THD + Noise (at -3 dB FS) | Left | Right | THD, % | +0.0075 | +0.0066 | THD + Noise, % | +0.0149 | +0.0116 | THD + Noise (A-weighted), % | +0.0121 | +0.0096 |
P18-朋友DIY一体机-cross
Stereo crosstalk | Left | Right | Crosstalk at 100 Hz, dB | -107 | -107 | Crosstalk at 1000 Hz, dB | -112 | -112 | Crosstalk at 10000 Hz, dB | -110 | -110 |
P19-朋友DIY一体机-dynamics
Dynamic range | Left | Right | Dynamic range, dB | +113.5 | +114.2 | Dynamic range (A-weighted), dB | +113.8 | +115.2 | DC offset, % | -0.00 | -0.00 |
P20-朋友DIY一体机-fr
Frequency response | Left | Right | From 20 Hz to 20 kHz, dB | -0.40, +0.02 | -0.43, -0.01 | From 40 Hz to 15 kHz, dB | -0.20, +0.02 | -0.24, -0.01 |
P21-朋友DIY一体机-imd
Intermodulation distortion | Left | Right | IMD + Noise, % | +0.0009 | +0.0009 | IMD + Noise (A-weighted), % | +0.0007 | +0.0007 |
P22-朋友DIY一体机-imdswept
IMD (swept tones) | Left | Right | IMD + Noise at 5000 Hz, | 0.0010 | 0.0009 | IMD + Noise at 10000 Hz, | 0.0009 | 0.0008 | IMD + Noise at 15000 Hz, | 0.0011 | 0.0010 |
P23-朋友DIY一体机-noise
Noise level | Left | Right | RMS power, dB | -113.6 | -114.1 | RMS power (A-weighted), dB | -114.2 | -115.0 | Peak level, dB FS | -87.6 | -87.7 | DC offset, % | -0.0 | -0.0 |
P24-朋友DIY一体机-thd
THD + Noise (at -3 dB FS) | Left | Right | THD, % | +0.0007 | +0.0007 | THD + Noise, % | +0.0008 | +0.0008 | THD + Noise (A-weighted), % | +0.0010 | +0.0010 |
共勉。
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