Hi. Does anyone know if the 990's balanced out are at +4db, or -10db?

I know that balanced outs are generally +4, but to my understanding that may not always be the case.

So if anyone knows if balanced outs are always +4db, or if not, if the 990 outputs are +4db or -10db, It would be great to get a definite answer.

I appreciate any help i can get.