DrSheep. Thank for correction. It optical in that to be replace with balance out.
Anyway both balance out and switch is optional.
Some of our customer select to retain optical since they are not using external amp.
For the filter switch, there are two options
Option 1: Select only one filter and donot install the switch. If you are listen to audiophile or vocal and would like to get sweet sound, we can default to Minimum phase soft knee. If you are listen to pop rock,...