You'll have to excuse me I sometimes just talk out of my ass!
I don't know where I saw it (and I know a little bit about this stuff, but not a ton thats for sure) But I saw where it was a 625 W 5-channel receiver, so 125 watts per channel. Then I saw 80 watts for the B channel, but I (of course) can't find it now. New egg is saying 125/110/80 watts depending on Ohms, so It is very possible I just jumbled up all of that information.
As for what I am currently running ohms and decible wise, I have no idea. I just hooked some wire up and started playin! Any way to tell? If I had to guess, The outdoor speakers aren't even about 1/10th as loud as my indoor speakers, but trying to compare the little speakers with a 5 speaker polk monitor system and a couple subs doesn't seem fair, it is way too quiet though I can tell you that much.