声卡/音频接口

录音设备是 Alesis io26 insert 口 1-2
苹果本子音量100％，输出口电平也不够高，DAW里提升了14dB，用Alesis做+14dB增益放大测试结果基本一样，成绩中等
10Khz以上频响下降太多，底噪大，互调失真也偏高

音量50％，HD535听起来比较大音量，输出电平低了很多，DAW提升20dB，同时Alesis做了+14dB增益，成绩比较差了

Testing device	MacBook Pro 13' 374 and Alesis io26
Sampling mode	24-bit, 96 kHz
Interface
Testing chain	MacBook Pro out 100%, io26 insert in 1-2 +14dB
RMAA Version	6.2.3
20 Hz - 20 kHz filter	ON
Normalize amplitude	ON
Level change	-0.3 dB / -0.3 dB
Mono mode	OFF
Calibration singal, Hz	1000
Polarity	inverted/inverted

Summary

Frequency response (from 40 Hz to 15 kHz), dB	+0.09, -0.78	Good
Noise level, dB (A)	-94.8	Very good
Dynamic range, dB (A)	95.0	Very good
THD, %	0.0028	Excellent
THD + Noise, dB (A)	-85.6	Good
IMD + Noise, %	0.0096	Very good
Stereo crosstalk, dB	-92.1	Excellent
IMD at 10 kHz, %	0.012	Very good
General performance		Very good

Frequency response

From 20 Hz to 20 kHz, dB	-1.35, +0.09
From 40 Hz to 15 kHz, dB	-0.78, +0.09

Noise level

	Left	Right
RMS power, dB	-88.2	-88.1
RMS power (A-weighted), dB	-94.8	-94.7
Peak level, dB FS	-65.2	-65.1
DC offset, %	+0.0	+0.0

Dynamic range

	Left	Right
Dynamic range, dB	+88.4	+88.2
Dynamic range (A-weighted), dB	+95.0	+94.9
DC offset, %	+0.00	+0.00

THD + Noise (at -3 dB FS)

	Left	Right
THD, %	+0.0027	+0.0029
THD + Noise, %	+0.0090	+0.0091
THD + Noise (A-weighted), %	+0.0051	+0.0053

Intermodulation distortion

	Left	Right
IMD + Noise, %	+0.0094	+0.0097
IMD + Noise (A-weighted), %	+0.0048	+0.0049

Stereo crosstalk

	Left	Right
Crosstalk at 100 Hz, dB	-80	-78
Crosstalk at 1000 Hz, dB	-90	-92
Crosstalk at 10000 Hz, dB	-92	-92

IMD (swept tones)

	Left	Right
IMD + Noise at 5000 Hz,	0.0074	0.0068
IMD + Noise at 10000 Hz,	0.0101	0.0084
IMD + Noise at 15000 Hz,	0.0207	0.0171

[ 本帖最后由 audiobarbird 于 10-6-21 16:14 编辑 ]