Custom order options:

Option 1:Custom order replace the ACSS output by RCA outputs, price is USD10.

Option 2: Custom order higher gain model for the HE6 and low sensitivity headphones:
        The unit default had 10DB on low gain for drive the headphone which has over 95DB sensitivity, and 20DB on high gain, already enough to drive the HE6 which has around 85DB sensitivity headphones. If the DAC output level quite low,customer want to boost +6 or +12DB gain, in total 26DB or 32DB gain, price is USD15.