I didnt act like a jerk, i linked you the manual from Alpine in case the one you linked wasnt correct. If you think im being a jerk, then i can pull out the insults...
I second that running the amp at minimum load can shorten the life of an amp. However this amp is 2 channel, so running one VC off each channel would be best. Also, there is a cooling kit you can get if you read the manual.
My 75w Logitech 7.1 system gets loud and low and it only has a 5" sub in it. You can hear it outside, feel it throughout the house and can be too loud. How do you know what hertz is playing at the time? are you playing sine waves or have an RTA? Sounds like you are wasting too much time...