Back around 1990 I went to a benefit show at The Stone Pony - it was supposed to be Paul Stanley along with a NY cult band called The Good Rats and Saraya. It wound up being the whole of Kiss, along with JLTurner, a couple of guys from The Rascals, and TM Stevens' band. Between Gene and the rest, there was alot of "rock helmets" on stage that evening. I dubbed the show Night of 1000 Rugs"
Rock helmets! haha!
I think Coverdale's singing the lower parts and Axle Rose is screaming the higher parts.
I didn't really watch the whole thing but I don't see any evidence of tapes, echo and tape delay, he's going to kill his voice though if it hasn't been already.
That guitar player in the first video is great if you like that sort of thing.