I've never met a cab I couldn't get a great tone out of. I used to design and build bass cabs. My main concern is it's ability to handle the volume I need to play at. Tone? That's what tone controls, preamps and such are for.
I
sort of agree. When I’m using supplied backline with bass guitar, at a gig, rehearsal space, etc., I can always get a
usable sound. That doesn’t mean it’s the sound I
want!
Not long after getting my Berg, I picked up a used GenzBenz 1-12 for my daughter to use. The GB wasn’t as clear as the Berg, not by a long shot. EQ didn’t really help. I could mess with the upper mids and treble, open up the tone control on the bass, etc. but it still wasn’t there. It just sounded like there was blanket over the cab. Fender Rumbles sound like that to me, too. I assume it's the actual drivers used as much if not more than the box design.
That’s not a big surprise, I’ve owned a lot of different home stereo speakers over the years and the ones I own now expose more fine details in the sound than any speakers I’ve onwed before. The fact that they cost me
four times as much may have something to do with it

A Berg Reference 1-12 (probably the closest to my older NT112) and the NXT112 are both $1179 list. There’s no Rumble 1-12, but the 1-15 only costs $420.
If I go over to
Sweetwater, they have two Ashdown 1-12 cabs that are 26 and 27 pounds for $359 and $299, an Orange cab that’s 26 pounds for $549, Ampeg Venture 27 pounds at $799, Aguilar 25 pounds for $809, Darkline 28 pounds for $809…and then nothing under 30 pounds for any price.
I played through the Aguilar SL112 on one gig and really liked the sound, but without putting them side by side I can’t say it matches or beats out the Berg NXT112 (which I’ve played through many times at rehearsals) for $370 less. You get what you pay for. Buy used!!!!!