i've already had a single16-46cs+/samson amp for a while now. i just received a second 16-46cs+ today!!!. after hooking up a second sub should my calibration points be lower due to the extra output of a second sub or should it remain about the same? with the one sub setup i had the svs black box set between 1 and 2 and my receivers sub gain set to minus 4(-4)on a scale of -10 to +10/ in order to reach 85db with sound and vision disc.now with both subs hooked up i thought that i may have to lower either the black box or my receivers setting ,but it seems to be staying the same, is this right? or wrong? thanx for any help you can provide.