I'm curious because I notice all these guys are using VERY thin strings and get huge guitar tone (AC/DC is 9s I think; pretty sure ZZ Top & Black Sabbath are 8s or 7s). I used 9s tuned to Eb for a long time, then a couple of years ago switched to 12s when I heard people saying how much bigger they sound. I think I changed pickups at the same time, so I never really got a direct comparison.
Anyway, over the last year or so I've been slowly going back to the thinner strings. Today was the first time in years I played 9s in Eb. And of course there's no standard measure for what sound "big", but for some reason the thinner strings - same brand (and age), same guitar, same pickup, same amp, etc - just sound bigger and better to me. There's definitely more high end, but when the action is adjusted properly, I just haven't felt there's any less low end. Seems like with the bigger strings, they can sustain better, but I always felt the high end was a little choked.
Couldn't agree more with mojotone and magiceights posts. Glad you brought up all those fellas with great tone. I gradually went up in size from 9-10-11's over the years too.
I think you should really use the right gauge accordingly to the scale length of the neck, style of guitar and accordingly to how aggressive or light your touch is. As of now I use 9's on most stuff usually. If I'm gonna tune down to open D or C. Then I usually use 11's.
I think it depends on the player. EVH on 9s is going to produce a bigger tone than most of us here on 11s. (I'm guessing many will disagree, but those who have stood next to him while he's playing would back me up here).
BUT, the question is, would EVH sound bigger on 11s as compared to his 9s?
I play 11s, both standard pitch and a half step down. Love the tension on the strings, and I find it difficult to play guitars with 9s.
10-46 is what I have been using on my strats and gibbys... I used 9's all through the mid to late 80's though. I think malmsteen uses 8s as does billy gibbons... no one could rightfully say their tone is thin!