Benchmark DAC2 Series - Page 48

DAC2 Series Instruction Manual Rev C Page 48
A
udio Precision DAC2 - THD+N vs AMPLITUDE AT 1 KHZ (w/20 kHz LPF unweighted)
Headphone Outputs, Relative to 0 dBFS, 0 dBFS = +7.2 dBu
DAC2 - HEADPHONE - THD+N_VS_AMPLITUDE.at27
ColorSweep Trace Line Style Thick Data Axis Comment
1 1 Green Solid 4 Anlr.THD+N Ampl Left
1 2 Red Solid 4 Anlr.THD+N Ampl Left
-104
-86
-102
-100
-98
-96
-94
-92
-90
-88
d
B
r
A
-14 -0-13 -12 -11 -10 -9 -8 -7 -6 -5 -4 -3 -2 -1
dBFS
Graph Plot 9 - Headphone Amplifier – THD+N versus Amplitude (DAC2 HGC and DAC2 D
model only)
This plot shows the THD+N performance of the headphone outputs under load. Note that the
THD+N performance of the headphone outputs approaches that of the balanced outputs. The
DAC2 includes Benchmark's HPA2(TM) headphone amplifier. The HPA2(TM) has a near 0-Ohm
output impedance which provides outstanding control and damping of the headphone drivers. The
HPA2(TM) has the voltage and current drive necessary to drive a wide variety of headphones.