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Portable Discrete  DAC+ Headphone amplifier
USB or internal battery power supply(12.6V/2500MA)

Supports full speed Asynchronous Transfer Mode
Built in the Tenor TE8802 chip

Built in  Hi-end grade WM8741 Chip
With USB to coaxial conversion
upport analog input

NFB-16 Price:  USD193
Accessories: USB cable X1 , Battery charge X1


*Please note:
1, The DC-IN only for the battery charge, it can't push into other DC power, otherwise will shatter the battery or the DC power within few seconds.
2, The Battery and charge are not audio-gd products, the manufacturer declare it least had 800 times full charge life . Before shipping we have 5 times charge and test . The battery and charge had 3 months warranty .
3, The battery charge (Only have this one model) : 
Summarize Use Manual Specs Technology Detail Custom Option Shipping Cost

How to install the TE8802 driver?
       The NFB-16 is a portable headphone amp built in DAC. At two years ago some customers advice me design a portable DAC + amp . But consider the amp design can't support low to 5V power supply, and I don't want design by a chip as the amp, so I can't design at that time.
       I always like to try to design this amp as a target  , after a lot practices, at last year I design the wide power supply ACSS amp, it can working well at +4 to +36V DC.

Built by discrete analog stages without any OPA  in the signal channels.
Built in 12.6V / 2500MA battery power supply .
The battery working time ( full charge, Test at  25 Celsius room temperature , only for FYI ):
            DAC+amp mode : 5-6 hours  (continuous working  )  .
                                          5-10 hours ( intermittent working)
            Amp mode  : 20-25 hours  (continuous working).
                                 20-35 hours    ( intermittent working)
Non- feedback ACSS analog output stage, wide range power supply, from +5V (USB power supply) to +12.6V (internal battery power supply)  .
More than 5,000uf audio grade NOVER capacitors are used to ensure ample and smooth power feed.
Total of 2 groups class A PSU are used to purify the power supply.

Applies a custom order ALPS 27 volume pot for reducing channel imbalance and improving on sound quality.
2 groups input :
  USB / Line IN (both RCA and 3.5MM )
Headphone output :  6.3MM and 3.5MM
Coaxial output : RCA SPDIF (0.5V P-P at 75 ohm load)
USB Audio Class 2 High-speed Input from PC/MAC
Supports full speed Asynchronous Transfer Mode
Resolutions support 16 / 24-Bit with sampling rate support 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz
Supports 2X , 4X and 8X oversampling customers setting

Sound Characteristics: 
NFB-16 applied the new wide range power supply ACSS amp design, its sound characteristics have been design neutral and dynamic .


What are the differences between these popular DAC chips:
  Dual WM8741 ES9018 AD1955 AD1852 WM8740
SNR 128 DB (Mono) 120 DB 120DB 114DB 117DB
DYNAMIC RANGE 128 DB (Mono) 129 DB 120DB 114DB 117DB



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