Re: Power Output
Yes if both are wired 2ohm and you have both positives and both negatives run to the amp.
I do not use nor do I tell people to set up an amp with a DMM I know people do it all the time and that’s their business if they want to take a chance on it being wrong.
I use an oscope for seting an amp. I use a DMM and a amp clamp to tell me how many watts I am producing or to match amps in cases where I am using 2 amps and 2 subs.