Ok, as o said my unit had come with 22uf ac coupling caps, in the ma12070 datasheet has the image shows, os recommended 2,2uf for high gain, 26db, and 1uf for low gain, 21db, is not by software, and the pvdd coupling capacitor also have a table with values, with my speaker, Cambridge audio sx-50, that are 8ohms i choose the 1000uf, that gives -3db at 20hz, my speaker -3db is 50hz, so no complaint.
In reality o bought this amp for the good review amir give it, but when i heard it for the first time i really dont like how it sounded, it was so muffled, besides the good measurements, i was almost puting it to sale and i decided to mod it, and it gave it a much more lifelike sound, much more dynamics and the spacialization, i dont have how to send it to amir review it, because i live in other country, and decided to share the mod with you guys for who wanna try, it wont kill your amp, maybe you like or not, now im in love with my loxjie, and that is what is important to me.