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频响曲线
ALC888：
SE200 7.1
很明显，ALC888对于超过20K的直接阻断，高频方面的浪线也要注意，嘿嘿。面对普通独立声卡（se200的7.1相当于普通独立声卡），alc888的频响曲线有些缺陷，但是比ac97时代好了很多。
信噪比
ALC888
| |
Left |
Right |
| RMS power, dB |
-92.4 |
-92.0 |
| RMS power (A-weighted), dB |
-93.5 |
-93.3 |
| Peak level, dB FS |
-72.9 |
-72.5 |
| DC offset, % |
+0.0 |
-0.0 |
SE200 7.1
低频这块，ALC888差距比较大了
| |
Left |
Right |
| RMS power, dB |
-92.7 |
-92.5 |
| RMS power (A-weighted), dB |
-94.0 |
-94.0 |
| Peak level, dB FS |
-70.1 |
-72.0 |
| DC offset, % |
-0.0 |
-0.0 |
动态范围ALC888
| |
Left |
Right |
| Dynamic range, dB |
+92.2 |
+91.9 |
| Dynamic range (A-weighted), dB |
+93.7 |
+93.4 |
| DC offset, % |
+0.00 |
+0.00 |
SE200 7.1
低频差距依旧大
| |
Left |
Right |
| Dynamic range, dB |
+92.9 |
+92.8 |
| Dynamic range (A-weighted), dB |
+93.9 |
+93.9 |
| DC offset, % |
-0.00 |
-0.00 |
THDALC888
| |
Left |
Right |
| THD, % |
+0.0013 |
+0.0013 |
| THD + Noise, % |
+0.0059 |
+0.0059 |
| THD + Noise (A-weighted), % |
+0.0054 |
+0.0056 |
SE200 7.1
| |
Left |
Right |
| THD, % |
+0.0014 |
+0.0015 |
| THD + Noise, % |
+0.0047 |
+0.0046 |
| THD + Noise (A-weighted), % |
+0.0040 |
+0.0041 |
THD+N两者差距还是有的，而且THD的图上，ALC888好像乱了点
IMD+N
ALC888
| |
Left |
Right |
| IMD + Noise, % |
+0.0067 |
+0.0069 |
| IMD + Noise (A-weighted), % |
+0.0057 |
+0.0058 |
SE200 7.1
| |
Left |
Right |
| IMD + Noise, % |
+0.0058 |
+0.0058 |
| IMD + Noise (A-weighted), % |
+0.0049 |
+0.0049 |
差距是存在滴
Stereo crosstalk
这个上次那个帖子骂7.1太厉害了
ALC888
| |
Left |
Right |
| Crosstalk at 100 Hz, dB |
-81 |
-78 |
| Crosstalk at 1000 Hz, dB |
-86 |
-88 |
| Crosstalk at 10000 Hz, dB |
-79 |
-80 |
SE200 7.1
| |
Left |
Right |
| Crosstalk at 100 Hz, dB |
-85 |
-84 |
| Crosstalk at 1000 Hz, dB |
-88 |
-89 |
| Crosstalk at 10000 Hz, dB |
-72 |
-70 |
注意，低频方面的立体声分离度，SE200 7.1赢了不少，10K以后SE200
7.1大幅拉高，不敌ALC888，这点么，只能说ONKYO这时候太不负责任了。而ALC888则在20K以后突然下降，这是因为截止了，嘿嘿。总的来说，立体声分离度大家都不是好鸟，声场都很难保证好。小熊在线www.beareyes.com.cn
IMD (swept tones)
ALC888
| |
Left |
Right |
| IMD + Noise at 5000 Hz, |
0.0058 |
0.0059 |
| IMD + Noise at 10000 Hz, |
0.0058 |
0.0059 |
| IMD + Noise at 15000 Hz, |
0.0059 |
0.0062 |
SE200 7.1
| |
Left |
Right |
| IMD + Noise at 5000 Hz, |
0.0056 |
0.0057 |
| IMD + Noise at 10000 Hz, |
0.0057 |
0.0055 |
| IMD + Noise at 15000 Hz, |
0.0057 |
0.0054 |
ALC888依旧在20K以后截止......双方半斤八两，都不怎么样。小熊在线www.beareyes.com.cn
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