Custom order options:

Option 1:Custom order replace the ACSS output by RCA outputs price is USD5.

Option 2: Custom order High Gain model for the HE6 and low sensitivity headphones:
      The unit default had 12DB on low gain for drive the headphone which has over 95DB sensitivity, and 22DB on high gain, already enough to drive the HE6 which has around 85DB sensitivity headphones. If customer want to boost +6DB gain, in total 28DB gain, price is USD15.