Topping D2 Headphone Amplifier & USB DAC with 4 inputs

Topping D2 Specifications:

DAC: DIR9001+AD1852
Output Voltage 1.85Vrms
THD+N 0.0022%@1kHz (sample rate: 96kHz)
Output impedance 200ohm
44.1kHz-96kHz
16bit-24bit

Headphone-AMP
Output Power 2 x 123mW @ 32ohm
THD+N
0.0028%@75mW, 32ohm
0.0027%@54mW, 300ohm

HIFI Electronic Components:
ALPS Potentiometer
KOA Resistance
nichicon FW Capacitance
nichicon MUSE ES Capacitance
ERO Capacitance
EPCOS Capacitance
Panasonic Relay
TOSHIBA Transistor
Burr-Brown OPA2134
Analog OP275

Power input
Power socket (5.5mm/2.1mm) x 1
Power Supply input DC 15V1A

Audio input
Audio IN RCA (Left/Right) x 1
Coaxial RCA IN (Spdif) x 1
Optical IN (Spdif) x 1
USB IN x 1

Output
Audio OUT RCA (Left/Right) x 1 (Line out, Can not control the volume by D2)
Headphone OUT(6.35mm) x1 (The volume can be controlled by D2)

Dimensions
about (W)115mm x (H)45mm x (D)200mm

Weight
D2 645g
D2 + AC adapter 830g

Includes:

1 x D2 Amplifier
1 x 15V1A AC adapter
1 x 6.35mm to 3.5mm Headphone jack converter
1 x User's manual