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NFB-12.1

Discrete  DAC+ Headphone amplifier / Preamplifier
Built in 2 Pieces Hi-end grade WM8741 Chips

NFB-12.1 Price:  USD215

NFB-12.1
   
        
  
Summarize Use Manual Specs Technology Detail Custom Option Shipping Cost

NFB-12
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NFB-12.1 Digital Filters Description Frequency response diagram from headphone / RCA output
( Click to zoom)
OS : 8

Filter : 2

8X oversampling , Minimum phase apodising filter.
Up to 48KHz support.  

Input sampling 44.1KHz,24Bit,
-2.5DB at 20KHz
Input sampling 48KHz,24Bit,
-0.2DB at 20KHz , -3DB at 23KHz
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OS : 8

Filter : 1

8X oversampling , Linear phase apodising filter.
Up to 48KHz support.  

Input sampling 44.1KHz,24Bit,
-0.2DB at 20KHz , -3DB at 25KHz
Input sampling 48KHz,24Bit,
-0.2DB at 20KHz , -3DB at 25KHz
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OS : 8

Filter : 3

8X oversampling , Linear phase half-band filter for backward compatibility.
Up to 48KHz support.

Input sampling 44.1KHz,24Bit,
-2.5DB at 20KHz
Input sampling 48KHz,24Bit,
-0.2DB at 20KHz , -3DB at 23KHz
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OS : 4

Filter : 2

 4X oversampling , Minimum phase 'soft-knee' filter.
Up to 96KHz support.

Input sampling 44.1KHz,24Bit,
-3DB at 15KHz
Input sampling 48KHz,24Bit,
-3DB at 17KHz
Input sampling 96KHz,24Bit,
-0.2DB at 20KHz , -3DB at 31KHz
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OS : 4

Filter : 1

4X oversampling , Linear phase 'soft-knee' filter.
Up to 96KHz support.  

Input sampling 44.1KHz,24Bit,
-3DB at 15KHz
Input sampling 48KHz,24Bit,
-3DB at 17KHz
Input sampling 96KHz,24Bit,
-0.2DB at 20KHz , -3DB at 31KHz
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OS : 4

Filter : 3

4X oversampling , Linear phase 'brickwall' filter.
Up to 96KHz support. 

Input sampling 44.1KHz,24Bit,
-2.8DB at 20KHz
Input sampling 48KHz,24Bit,
-0.3DB at 20KHz , -3DB at 24KHz
Input sampling 96KHz,24Bit,
-1DB at 20KHz , -3DB at 42KHz
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OS : 2

Filter : 2

2X oversampling , Minimum phase 'soft-knee' filter.
Up to 192KHz support. 

Input sampling 44.1KHz,24Bit,
-3.2DB at 20KHz
Input sampling 48KHz,24Bit,
-2.5DB at 20KHz , -3DB at 22KHz
Input sampling 96KHz,24Bit,
-0.5DB at 20KHz , -3DB at 25KHz
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OS : 2

Filter : 1

2X oversampling , Linear phase 'soft-knee' filter.
Up to 192KHz support.

Input sampling 44.1KHz,24Bit,
-3.5DB at 20KHz
Input sampling 48KHz,24Bit,
-2.7DB at 20KHz
Input sampling 96KHz,24Bit,
-0.8DB at 20KHz , -3DB at 25KHz
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OS : 2

Filter : 3

2X oversampling , Linear phase 'brickwall' filter.
Up to 192KHz support.

Input sampling 44.1KHz,24Bit,
-2.5DB at 20KHz ,  -3DB at 22KHz
Input sampling 48KHz,24Bit,
-2DB at 20KHz ,  -3DB at 23KHz
Input sampling 96KHz,24Bit,
-0.2DB at 20KHz , , -3DB at 40KHz

Improvement may result in changes in specifications and
design without notice.
S/N Ratio


118db
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 Output Level


 Headphone output : 10V RMS 
Variable output : 5V Max
Fixed output: 2.25V RMS
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Output power
Only for headphone.


3500mW/25 ohm
1800mW/50 ohm
900mW/100 ohm
300mW/300 ohm
150mW/600 ohm

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Output impedance

2 ohm /  Headphone output
2 ohm / DAC output

Input Sensitivity


0.5 Vp-p(75 Ohms, Coaxial)
19 dBm (Optical)
USB1.1 /  2.0 (Full Speed)
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Support Sampling  USB model: 44.1kHz, 48kHz, 96kHz
 Coaxial model: 44.1kHz, 48kHz, 88.2kHz, 96kHz, 192kHz
Optical model: 44.1kHz, 48kHz, 88.2kHz, 96kHz
Frequency Breadth


20Hz - 20KHz ]-0.2DB^
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Power Requirement
1 Version  100-120V  AC 50/60 Hz
2 Version  220-240V  AC 50/60 Hz
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Power Consumption
10W
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Package Weight
2KG
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Dimensions
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W163 X L210 X H42(MM, Fully aluminium ) 
Accessories
AC power cord            X1
USB cable                X1
Optical cable            X1
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