ellisar - thanks for posting. ARC ON/OFF has been discussed previously. With ARC OFF, you do need to reduce the sub trim in the Anthem by amount of room gain - that's one reason why OFF probably sounded louder. Many of us have also noted ARC ON dulls the sound...some even feel it still does even with ARC OFF or correction limited to a lower value (eg, it still impacts sound above the correction limit). Personally, I don't use it for music (and even went to a dedicated 2 channel preamp). I'm in process of redoing my sub integration with REW/miniDSP. I may run ARC just to see what it sets trims / crossovers at, but will likely not upload it into my MRX720, even for HT, as I have no way to confirm that Remove ARC selection in Genesis actually removes the ARC values (I still see the file name in System Info, don't see N/A in the Input setup for ARC setting. Someone also posted that they see the same behavior and can only over-write, not remove, ARC coefficients).