Wisdom in mind,   enthusiasm at heart.

NFB-1AMP(2019 Edition)

The full balanced design based on Master 9
Class A PSUs built in
Discrete Headphone amplifier / Preamplifier
Super Exponential Volume Characteristic
8000mW at 40 ohm output
OCC and hi-end parts applied

Summarize

Use Manual

Specs

Custom Option

Shipping Cost

Please Note:
1,      If you have not a good DAC or good source, only plan to use with the PC soundcard or  cell phone, this product is not suite you.
2,      For get the product best performance, you must connect with a good balanced source and good balanced headphone .
3,      The mini remote shipped without battery because the either DHL and UPS limit shipping by plane , customers want to buy one CR2025 battery and assemble in the remote. The metal remote need assemble two AAA battery by customer.


Discontinued the analog idle input short circuit function:
         The unit  had design the analog idle input short circuit for avoid the disturb between different sources.
         This design also applied in a lot high end brand devices.
         The working theory :  Without the idle input short circuit ,if the input 5 and input 4 had connect two extra DACs,  while users select the either input 5 and input 4 , the another input signal will fire through the circuits and mix  into the using signal, even though this signal is  weak  but still can degrade on the sound quality.
          With the idle input short circuit function : if user select either the input 5 and input 4, the another input signal will short circuit then no any signal fire through circuits , can keep the sound quality had not degrade.
       Below case users want to discontinued the idle input short circuit function, pull off the 4 jumpers as mark on the photo:
      1, The same extra source not only connect the unit analog input, but connect with other amps simultaneity.
      2, The same extra source connect to the unit different inputs  at simultaneity.
          

Select the input channel:
Push the "Input" button to select the input channel.
Input 1: XLR input
Input 2: RCA input
Input 3: CAST input
Input 4: RCA input
Input 5: XLR input

Gain mode: 
Push the button "Gain", the display will show between " L, H" .

Output mode: 

Push the button "OUT", the display will show between " P , H".

"H" mean the unit output for headphones on front plate.

Volume knob :

          Change NFB-1AMP volume .

Setting the NFB1AMP functions:

          While the NFB1AMP select IN5, and the volume number on "0",turn the volume lower 1 step for active the setting mode. In term the 3 digital number in the display, one digital number blinking , it means this digital number function can be setting. If turn the volume knob lower 1 step, quit the setting mode.
         In setting mode, push the "INPUT" button once, the right one digital number blinking.
         Push the "Gain" button once, the blinking digital number change between 1 and 0 . 1 means the function active, 0 means the function disable.



        The left first digital number means the remote function setting, if it set to 0, whether long or short push the remote controller volume button, the unit volume only change 1 step . If set to 1, push and hold the remote controller volume button, the unit volume change continuously .In case if set to 1 but the unit had control by other devices , set to 0 please.

        The left second digital number is for set the auto dark. Set to 0, the unit display always lights while power on. Set to 1, the unit auto dark after around 10 seconds while the unit power on and without operate any buttons, there is only a LED has light for show the unit power state.

        The right first digital number for set the volume memory function. Set to 0, the unit has not volume memory . Set to 1, the unit has volume memory even restart .