I figured I'd post this here for reference.
I was taking some measurements with my active set-up today. I've been meaning to do this for a while to satisfy my curiosity. I was hitting 100dBC peaks at 14 feet away. This is very loud for me. I'd never listen this loud. My Onk was at -5 and channel levels are calibrated pretty close to 0.
I had my actives playing wide open and no sub. My DMM read about 5VRMS max on the woofers, 3V on the front mids and half a volt on the front tweeter. I didn't measure the rears. I can't measure true voltage or SPL peaks. I estimate maybe 8W average max total.
I don't know what the peak power was but if I work back from the SPL I was measuring and the spec'd in-room active LFR sensitivity, I was hitting 50W peaks per channel. So pretty close to 9dB peaks above average. I was listening to Bob Marley Legend on tape via RCA cables that are 10 feet long and 40 years old.You know...the ones that are as thin as a hair and a depressing gray color.
Of course all this could be wrong because my equipment is laughable but it feels right.