Wisdom in mind,   enthusiasm at heart.

Master 9 MK3
Since 1st. May. 2024
True dual mono ,ture balanced ACSS design 
Not only a headphone amp but a dedicated preamp
Fully discrete pure class A design (9000mW @ 40 ohm)
2 Type gain modes can drive high and low sensitivity easy
Neutral and simulate tubelike two sound flavors for user choice on the front plate
　

Please note:
         This product applies the latest power technology. Therefore the working temperature has dropped significantly compared to the previous generation products. This allows leaving power on over the long term.
        This product is burned-in for at least 100 hours before shipping.
        We recommend burning it for an additional 300 hours for best results.
        The quickest way to complete the burn-in of this product is to power on it continuously, no matter with or without music playing to the burn-in.
        Do not immediately power on the unit after powering it off. Wait for at least 30 seconds.

Connect with KRELL amplifiers' CAST input or SATRI amplifiers' current input:
         Master 9 MK3 is compatible with KRELL amplifiers CAST inputs.
        A cable can be made with one side connecting to Master 9 MK3 ACSS outputs, other side to a  KRELL amplifier CAST inputs.
         The ACSS output pins:
         Pin 1, GND
         Pin 2, Hot
         Pin 3, Cold
         The ACSS input pins:
         Pin 1, GND
         Pin 2, Hot
         Pin 3, Cold
         The XLR input/output pins:
         Pin 1, GND
         Pin 2, Hot
         Pin 3, Cold

Button and Knob functions ：


Leftmost button: Power On or Off.
Left button on left side: (Only available while user want to change the set  feature .)
        Push the left button once, the leftmost digit of bottom will blink, which indicates it is selected. This allows changing the corresponding setting. Push the right button to select the desired value. While the display is still blinking, push left button again , the next digit to the right will be selected and blink.
         While the rightmost digit of bottom is blinking, push the left button one time, quite the set menu and back to the normal state.

Right button on left side: (Mulriple functions.)
         While the display is in normal state (not blinking), it allows selecting the input source in decreasing order. One of the following will be displayed:
"1 - XLR"
"2 - RCA"
"3 - XLR"
"4 - ACSS"

Knob on right:
       Adjust the volume control .

Display inform ：
Leftmost on top: mean the input channel number .
Left 2nd and 3rd on top: mean the volume level, from 0 to 99, 99 is the max volume .
Leftmost on bottom: mean the output channel select, "H" mean selected headphone output , "P" mean select preamp output .
Left 2nd on bottom: mean the gain select , "H' mean the High gain 25DB , "L" mean the Low gain 16DB . Available with all inputs.
Left 3rd on bottom: mean the headphone output modes, "n" mean neutral flavor, "t" mean simulate tubelike flavor .
Left 4th on bottom: Mean the display auto-dimming setting:
                     d (Auto Dark) : Enables the display's auto-dimming; the display will dim 10 seconds after the buttons are left untouched, only keeping a LED bar lit to indicate the unit is turned on. As soon as a button is touched, the display will turn back on.
                     b (bright) : Disables the display's auto-dimming, the display will remain on at all time.
Rightmost on bottom: mean the volume memory , 'r' (Remember) mean volume memory active, "f" (Forget) mean volume memory Disable.

             When push the left button into the setting menu, the display on top show the real time temperature of the unit inside.

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 4 and input 3 had connect two extra DACs,  while users select the either input 4 and input 3, 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 4 and input 3, the another input signal will short circuit then no any signal fire through circuits , can keep the sound quality had not degrade.
          In world there are more than 99% DACs and the sources had allow the outputs short ,  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.