There is a high pass and low pass setting in the EQ adj. I read something about the pro being able to act as a low pass to the sub though the headphone jacks due to the dual DAC. Not sure how that works with the home version. Do you need two? One hands off the signal to your mid/high amp or powered speaker and the other hands off low pass through the sub. I had always wondered how that is achieved in the reg adi2.... I bet Mathias of RME would answer that on his forum. They are very active on that forum