The first time connect the Master 2A MK2:
     Connect the signal cables between the preamp and Master 2A MK2, confirm the Master 2A MK2 selectors that on the rear have select to proper position.
     About the gain switch , recommend turn to "L" (20 dB) when the speakers has higher than 95dB sensitivity , otherwise turn to "H" (26 dB) .
     Users also can try the AB compare find the best choice because the preamp and listen room size also effect the loud level, please shut down the amps before switch the gain .



The rule of power on and off the Master 2A MK2:
     Power on the transport, then the DAC and preamp , latest turn on the Master 2A MK2.
     When power off the system, must turn off the Master 2A MK2, then power off other units in the system.

Please note:
     The stock AC power cables can not show the Master 2A MK2 real performance , they are only for test the Master 2A MK2 if can work. We recommend customer buy the good quality power cables for the Master 2A MK2, the power amp even need two strong power cables .
     We have the power cable for customer order   http://www.audio-gd.com/Pro/CablesEN.htm

How to connect the preamp only had the RCA output :
      The Single ended preamp can not show how good of the Master 2A MK2, we don't recommend that connected.
      But if must connect, can built the RCA to XLR cable connect the preamp and Master 2A MK2.