Leijine Headphone Amplifier A496plus type1
RightMark Audio Analyzer test result

Power Source:DC24volt AC Adapter     Mian Opeamp:NJR/MUSE8820    DC servo Opeamp:TI/OPA2134
Measuring Device : Asus Xonar Essence ST

Testing chain: External loopback (line-out - line-in)
Sampling mode: 24-bit, 48 kHz

Summary

General performance: Very good

Frequency response

Frequency range	Response
From 20 Hz to 20 kHz, dB	-0.23, +0.02
From 40 Hz to 15 kHz, dB	-0.13, +0.02

Noise level

Parameter	Left	Right
RMS power, dB:	-114.0	-112.8
RMS power (A-weighted), dB:	-115.5	-113.9
Peak level, dB FS:	-92.3	-91.1
DC offset, %:	-0.00	-0.00

Dynamic range

Parameter	Left	Right
Dynamic range, dB:	+112.0	+110.7
Dynamic range (A-weighted), dB:	+114.7	+113.2
DC offset, %:	-0.00	-0.00

THD + Noise (at -3 dB FS)

Parameter	Left	Right
THD, %:	0.0010	0.0012
THD + Noise, %:	0.0012	0.0013
THD + Noise (A-weighted), %:	0.0014	0.0016

Intermodulation distortion

Parameter	Left	Right
IMD + Noise, %:	0.0013	0.0014
IMD + Noise (A-weighted), %:	0.0011	0.0013

Stereo crosstalk

Parameter	L <- R	L -> R
Crosstalk at 100 Hz, dB:	-91	-91
Crosstalk at 1 kHz, dB:	-91	-92
Crosstalk at 10 kHz, dB:	-91	-90

IMD (swept tones)

Parameter	Left	Right
IMD + Noise at 5 kHz, %:	0.0015	0.0015
IMD + Noise at 10 kHz, %:	0.0015	0.0015
IMD + Noise at 15 kHz, %:	0.0015	0.0015