well if you have an audio interface than -10db will overpower the sub and it will pop and even shut down depending on interface like my SSL2 is too powerful so -10db at high volume always have that effect one thing to note is that if you have this sub than to use +4db on sub but speakers that you use from this sub should be put at -10db otherwise they will be more quite since sub amp correctly uses power from interface at +4db you dont have to do that to speaker and just set at -10db
