DAC + Headphone AMP

[Captain828]

I would love to see an integrated DAC + Headphone AMP combo based on the AKM4499 chip.

It should be similar to the ZD3:

• inputs:
  • USB
  • Optical
  • HDMI
  • Bluetooth
  • Coax
• outputs:
  • back:
    • XLR balanced
    • RCA
  • front:
    • 3.5mm SE
    • 4.4mm balanced
    • 6.3mm

Similar to the ZD3, it should support swappable op amps, for HP, XLR and RCA outs but not sure on the circuitry of that: maybe it could be set up in such a way where the SE outputs can share the same op amp and the balanced outputs can share 2 op amps?

As for the front of the unit, from left to right:

• input knob (black), with positions to switch input (USB, optical, HDMI, BT, coax)
• the HP outputs (3.5mm, 4.4mm, 6.3mm)
• gain switch, with 2-3 positions (Low/Med/High or just Low/High)
• output switch, with 3 positions to switch output (RCA, HP, XLR)
• power indicator LED
• volume knob, with hold to power on/off, like on ZD3/ZA3