Benchmark HPA4 - Page 40

Instruction Manual for HPA4 with 1.0.X Firmware – REV B Page 40
Graph 9 - Differential Phase - Headphone Amplifier - 300-Ohm Load
This plot shows the differential phase between the left and right headphone channels. The
extended frequency response keeps the phase response of the two channels well matched over the
audio band. This plot shows that the differential phase is virtually perfect! At 200 kHz, the
differential phase error is only about 0.1 degree.
Notes:
• The vertical scale is the phase difference between the left and right channels.
• Balanced inputs to headphone outputs, volume control set at 0 dB.
Audio Precision
07/13/18 12:30:10
Differential_Phase_Bal_HP_300_Ohms.at27
ColorSweep
Trace
Line Style Thick
Data Axis Comment
1 1
Green Solid 4 Anlr.Phase!Delta Left
-1
+1
-0.9
-0.8
-0.7
-0.6
-0.5
-0.4
-0.3
-0.2
-0.1
+0
+0.1
+0.2
+0.3
+0.4
+0.5
+0.6
+0.7
+0.8
+0.9
d
e
g
10
200k
20 50
100
200
500
1k
2k
5k
10k 20k 50k 100k
Hz