Portable USB headphone amps

Specs as supplied by the manufacturer.

Aurender Flow $1,295

32bit/384kHz , DSD64/128 DAC

Can be fittes with a SSD up to 1TB.

The SSD acts as USB storages for the computer, you can't play from it on the Flow itself.

Input	USB 3.0 ( Audio Class 2.0)
Input2	SPDIF Optical
Output	1/4 inch/6.35mm Headphone Jack
Volume Control	-110dB ~ 0dB, Velocity Sensitive Operation
mSATA Slot	Optional mSATA storage up to 1TB
Output Impedance	0.06 Ohm Max
THD+N	Max -114dB
IMD(SMPTE)	Max -112dB
SPDIF Mode(Optic)	up to 24bit/192kHz
PCM Mode(USB)	up to 32bit/384kHz
DSD Mode(USB)	DSD64, DSD128 / Dop Mode
DAC Chip	ESS9018K2M
Play Time	7+ Hours
Battery	SAMSUNG SDI 4450 mAh
Weight	450g(1.0 Pounds)
Output Power THD+N 0.0002% 0.0005% 0.0005%	43 mW/600 ohms, 87 mW/300 ohms, 320 mW/60 ohms, 380 mW/32 ohms,
THD+N (1kHz 5.1V rms output)	0.0002%
Dynamic Rage	Max 122dB
Damping Factor	>130
Dimensions	80 x 137 x 28 (mm) 3.1 x 5.4 x 1.1 (inches)

Added 3/2015