Test report

Testing device

BOSE 4401 - Original condition. Remarks : right channel is defective, hence the poor global performances. Only left channel performances should be considered as valid.
Sampling mode 24-bit, 48 kHz
Interface M_Audio Transit USB
Testing chain External loopback (line-out - line-in)
RMAA Version 6.2.0
   
   
20 Hz - 20 kHz filter ON
Normalize amplitude OFF
Level change -0.7 dB / -0.2 dB
Mono mode OFF
Calibration singal, Hz 1000
Polarity correct/correct



Summary

Frequency response (from 40 Hz to 15 kHz), dB
+0.07, -0.06
Excellent
Noise level, dB (A)
-86.0
Good
Dynamic range, dB (A)
84.6
Good
THD, %
2.477
Very poor
THD + Noise, dB (A)
-29.6
Very poor
IMD + Noise, %
3.669
Poor
Stereo crosstalk, dB
-58.9
Average
IMD at 10 kHz, %
0.750
Poor
General performance
 
Average



Frequency response

Spectrum graph

From 20 Hz to 20 kHz, dB
-0.12, +0.07
From 40 Hz to 15 kHz, dB
-0.06, +0.07



Noise level

Spectrum graph

Right channel = dead
Left
Right
RMS power, dB
-77.6
-67.7
RMS power (A-weighted), dB
-87.6
-84.4
Peak level, dB FS
-66.2
-52.4
DC offset, %
+0.0
-0.0



Dynamic range

Spectrum graph

Right channel = dead
Left
Right
Dynamic range, dB
+77.4
+67.7
Dynamic range (A-weighted), dB
+86.1
+83.1
DC offset, %
-0.00
-0.00



THD + Noise (at -3 dB FS)

Spectrum graph

Right channel = dead
Left
Right
THD, %
+0.0180
+4.9357
THD + Noise, %
+0.0335
+4.9358
THD + Noise (A-weighted), %
+0.0241
+6.5695



Intermodulation distortion

Spectrum graph

Right channel = dead
Left
Right
IMD + Noise, %
+0.0436
+7.2953
IMD + Noise (A-weighted), %
+0.0262
+2.9660



Stereo crosstalk

Spectrum graph

 
Left
Right
Crosstalk at 100 Hz, dB
-50
-59
Crosstalk at 1000 Hz, dB
-55
-60
Crosstalk at 10000 Hz, dB
-53
-56



IMD (swept tones)

Spectrum graph

Right channel = dead
Left
Right
IMD + Noise at 5000 Hz,
0.0550
2.5987
IMD + Noise at 10000 Hz,
0.0371
1.0957
IMD + Noise at 15000 Hz,
0.0486
0.6631