My first thought was an A-Bomb but when you mentioned that huge bottom end it made me think again as the A-Bomb has a lot of high mids and they tend to be the dominant aspect of the pickup.
not really, in my experience
I actually sold it cause it had far less upper mids than I was expecting
considerably less than both the holy diver and aftermath in the same guitar (the '73 lp custom in my avatar)
it had a lot of treble edge, lot of bass and low mids, but the center and upper mids felt quite flat
This is why I find it so difficult to assess the A-Bomb! In my guitar the bottom end was swamped by aggressive, tight, bright hairiness so whenever I think of it, I never think of it having a bottom end at all. Your comment is actually particularly interesting for something I'm currently considering but I'll elaborate on that in my own thread rather than hog this one.
well, it was indeed all that, but quite bassy and not upper mid heavy
I even had to back it down quite a bit to tame the bass and output
most of the other pups I had in this guitar were set very close to strings
I was kinda disappointed cause I was expecting something like the holy diver, but with more aggressive upper mids
got more aggression than I actually wanted, but not the upper mids
probably should have gone with the rebel yell
replaced it with a mcp afwayu at the time, which had a fuller midrange, but it was even bassier and not as organic
my guitar is quite bass heavy, but the midrangy models like the diver, aftermath and black dog showed a more controlled low end (in amount of bass, not tightness) than the nailbomb, cold sweat or even the riff raff (mine has a thicker magnet, so it's probably a little bassier than usual)
the aftermath always felt like it was missing something in the low E string (actually tuned to Eb or C#), compared to the cold sweat and nailbomb, specially on non-muted single notes and heavy sliding riffs
the diver and dog had way less output and volume, but they sounded a little fuller and deeper, despite of having almost the same overall voicing (MIDS everywhere)
if you didn't like the nailbomb for particular guitar, it still might work for a different one
I had completely different experiences with the holy diver and cold sweat simply going between different gibson models (which changes mostly shape/size and top)
I didn't enjoy the NB in that particular les paul, but I'd probably love it in the '78 greco lp std I had, or maybe in the PRS CE-22 I had
or maybe even in my SG (that sounded amazing with VHII's, by the way)