D-28 (ES9038Pro)

 DAC + Discrete transistors Headphone amplifier & Preamplifier
With XLR & RCA analog inputs
built in Sabre ES9038Pro
USB / HDMI support DXD,up to DSD Native 512，PCM 32Bit /384KHz
Heavy power supply by total of 10 groups of double stage PSU
1500 mW @ 100 ohm (per channel) Pure class A output
9500mW @ 25 ohm (per channel) with H / L gain ,
drive the 80DB -115DB sensitivity headphone easy
User can change the digital parameter settings on front plate
　

Select the input channel:
Push the "Input" button to select the input channel.
Input 1: USB input
Input 2: HDMI-IIS input
Input 3: Optical input
Input 4: Coaxial input
Input 5: RCA analog input
Input 6: XLR analog input

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

Output mode: 
Push the button "DAC/HP", the display shows between " P , H" or "d,H".

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

“d“ While the red button push into , the "P" mode change to display "d" , it mean the all rear outputs without volume control, work in the DAC mode .(Please note : If users connect with the non volume power amp or active speaker, must ensure can not set to DAC mode . The headphone output always with volume control .)



Volume knob :
Change volume .

Function setting introduce :
         The unit can set the inside parameters from front plate without open the unit .

Please note:
         If the unit had connect to the external power amp , while user want to change the setting, please shut down the power amp volume .

DAC/HP button :
          While the input channel selected between 1 to 4 , push the “DAC/HP” once, the display left 1st number blinking,  push it again go into the setting menu while it blinking .
          In the setting menu, the left 1st number blinking, it mean this number can change the setting by push the "Input" button .
          In the setting menu, push the "DAC/HP" can blink  the next right one number . Push the "Gain" button can blink the next left one number . .

Left 1st number：PCM digital filter modes :
          Display 1: Fast roll-off,  Linear.
          Display 2: Slow roll-off, Linear.
          Display 3: Fast roll-off, Minimum. (Recommend for neutral sound)
          Display 4: Slow roll-off, Minimum
          Display 5: Fast roll-off, Apodizing.
          Display 6: Fast roll-off, Hybrid.
          Display 7: Brickwall filter.

Left 2nd number：DSD digital filter roll off parameter:
          Display 4: 47KHz .
          Display 5: 50KHz.
          Display 6: 60KHz.
          Display 7: 70KHz. (Recommend for neutral sound)

Left 3rd number：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 without operate any buttons, there is only a LED has light for show the unit power state.

Left 4th number：Remote mode :
          Set to 0, whether long or short push the remote controller volume button, the unit volume only change 1 step .
          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.

Right one number：Memory mode :
           Set to 0, the unit has not volume memory .
           Set to 1, the unit has volume memory even restart . (Based on the exist memory chip technology, the memory life is 100,000 times , for the memory chip life can over 10 years, we design the memory write data at 3 seconds after stop all operate on the unit . If the memory over life, the unit just can not memory but has not effect the working ) .