@

Wisdom in mind,   enthusiasm at heart.

Home Products Warranty Shop Contact Us Shipment Chinese
@

NFB-5.32]USB applied USB-32^
Discrete  DAC+ Headphone amplifier / Preamplifier

32bit / 384K Asynchronous Transfer  USB-32 Chip
Built in 2 Pieces Hi-end grade WM8741 Chips


NFB-5.32 Price :USD378

                   
Summarize Use Manual Specs Technology Detail Custom Option Shipping Cost

The rule of the power ON /  OFF:
Power On :
     Source
power ON ---->    NFB-5 power ON ----> Amp power ON
Power Off:
    Amp power OFF
---->  NFB-5 power OFF   ---> Source power OFF .

Setting the bit and sampling transfer:
     
Win 7 :The NFB-5.32 have driver control panel can setting the bit and sampling , we are recommend setting at 32 bit transfer for the best transfer with WM8741(WM8741 can accept 32bit input data) . (Once users setting 32bit in driver control panel, the Windows device audio control panel will appear 32bit option .)
     In Mac OSX have not driver install necessary , so there is have not driver control panel but users can setting in the OSX MIDI option panel .


The NFB-5 functions:

                
@

Front plate:

Volume knob:
Control the volume level of the headphone and variable DAC output.

DAC/HP switch:
Select the output modes of the NFB-5.
Display 1 : Headphone output . Bypass the built in OPA, signal transmit by ACSS only.
Display 2 : Headphone output . The built in OPA active , signal transmit through the OPA convert to ACSS .
Display 3 : DAC output .  Bypass the built in OPA, signal transmit by ACSS only. Users can choice the DAC output either
variable and fixed.
Display 4 : DAC output . The built in OPA active , signal transmit through the OPA convert to ACSS .Users can choice the DAC output either variable and fixed.

Gain switch:
Select the high/low gain modes of the NFB-5.      
Display H : High gain mode at +12DB.     Display L : Low gain mode at 0DB.

Selector switch:
Select the input modes of the NFB-5.   
Display U : USB input.     Display C : Coaxial input.    Display O : Optical input.

Rear:
Power socket: For power input.
USB socket: For USB input.
Opt socket: For optical input.
Coax socket: For coaxial input.
DAC out sockets: For dedicated DAC output. (The DAC output level can be chosen between variable and fixed, see below).

Flavor switch:
Select the oversampling and digital filter response of the NFB-5.

Frequency response diagram RCA / ACSS output :
 
( Click to zoom)
Display 7 ( OS=8, Filter = 1) : Input sampling 44.1KHz,24Bit,
-2.5DB at 20KHz
Input sampling 48KHz,24Bit,
-0.2DB at 20KHz , -3DB at 23KHz
@
8X oversampling , Minimum phase apodising filter. Support up to 48KHz .   @
@ @ @ @
Display 8 ( OS=8, Filter = 2) : Input sampling 44.1KHz,24Bit,
-0.2DB at 20KHz , -3DB at 25KHz
Input sampling 48KHz,24Bit,
-0.2DB at 20KHz , -3DB at 25KHz
@
8X oversampling , Linear phase apodising filter. Support up to 48KHz .  @
@
Display 9 ( OS=8, Filter = 3 ): Input sampling 44.1KHz,24Bit,
-2.5DB at 20KHz
Input sampling 48KHz,24Bit,
-0.2DB at 20KHz , -3DB at 23KHz
@
8X oversampling , Linear phase half-band filter for backward compatibility. Support up to 48KHz .                                       @
@
Display 4 (OS=4, Filter = 1 ): 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
 4X oversampling , Minimum phase 'soft-knee' filter. Support up to 96KHz . 
@
Display 5 ( OS=4, Filter = 2) : 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
4X oversampling , Linear phase 'soft-knee' filter. Support up to 96KHz .
@
Display 6 (OS=4, Filter = 3) : 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
4X oversampling , Linear phase 'brickwall' filter. Support up to 96KHz .   
@
Display 1 (OS=2, Filter = 1): 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
2X oversampling , Minimum phase 'soft-knee' filter. Support up to 192KHz . 
@
Display 2 ( OS=2, Filter = 2) : 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
2X oversampling , Linear phase 'soft-knee' filter. Support up to 192KHz .     
@
Display 3 (OS=2, Filter = 3 ): 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
2X oversampling , Linear phase 'brickwall' filter. Support up to 192KHz . 

 How to set the NFB-5 DAC output between Variable and Fixed line level ?

   
The NFB-5 has one group Line out for dedicated DAC output, In default its output level setting is at variable . But owners can set it to can select between variable and fixed or output variable line level only . See the photos, Push into the jumper for Fixed output (DAC output mode only).

          

 OPA ]The owners must not install the OPA wrong)
(For users choice and purchase to replaced the default chip OPA2134, The NFB-5 can bypass the OPA for most neutral sound, so the OPA just for implement different sound flavors.
http://www.audio-gd.com/Pro/diy/OPA/OPAEN.htm

OPA-EARTH Modules

USD22.5

Sounds fairly neutral.

OPA-MOON Modules

USD25

Sounds a bit tube-like, that is, a little soft, warm and musical.

OPA-SUN Modules

USD30

Sound a bit dynamic.


@

备ק号:粤ICP备05020367号

权Ҧ:          庆华  ͧӭ响

Copyright(C) 2004   www.audio-gd.com    All Rights Reserved@