I've been playing around with my B-52 AT-212 and I've found that I can get a pretty tight sound. Kinda, vintage tight, like Ride the Lightning tone.
But, over the years, I've developted a tone in my head and the tighter I make my amp sound the closer I get too it.
What amp (preamp, power amp, and cab setup) has the tightest, most focused bass around? Minimum flab, doesn't matter if its a 6, 7, or 8 string guitar. I'm not too focused on clean or overdrive sounds, my B-52 does those just fine.