cannabispinoy

yes know about step 2 from the manual but which outputs are they referring to? im taking the rcas from the front right channel and plugging it into the dd1, doing the same with the sub output. i just need to know which one i should use. LPF on HU is set to "through"

when i tune the HU using rca's, which output should i use the front outputs or the sub output. when i use FrontRight channel I get 32 on 40hz and 35(max) on 1khz but using the sub output I get 28 for both 40hz and 1khz tone. any suggestions? i have everything flat.