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Master 9
(2017 version,Since 1st. May.2017)

Real Balanced ACSS design 
Pure Class A  (9W @ 40 ohm)
Preamp & Headphone amp
Super Exponential Volume Characteristic
OCC and hi-end parts applied , no upgrade option necessary



Summarize Use Manual Specs Shipping Cost

The unit applied input short design :
         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 don't want the idle input short circuit function, users can open the chassis, pull off the jumpers of the proper input channels, please note must pull off of left and right channels together :
        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.


HP/PRE switch :
          Select the Master 9 output model  , display "H" mean for headphone output, display " P" mean for preamp output.

Gain switch :  
          Below cases may select the high gain mode (The gain modes do not available for the ACSS input ):
          1, The source output level <1.25V RMS (RCA) or <2.5V RMS (XLR) .
          2, The headphone have very low sensitivity .

Selector switch :
          Select the Master 9 inputs from IN 1 to IN 5.

Volume knob :
          Select the Master 9 volume control .

Debug switch :
          Select the Master 9 if have the volume memory while restart .

The display auto dark :  Push into the jumper is auto dark .Please operate the jumper while the unit power off (Available in the products later than 1st Aug.) .


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