I learned long ago that I had to have the ability to raise my bass to uncomfortable levels for the guitar players (basically bury them). First experiences was a 1966 Fender Bassman (50-watt all-tube w/ 212 cab) that worked fine on tour in the early 70's until the guitarist and keyboardist bought Vox Super Beatle amps. Kept being told to turn up at gigs to volumes that just made the speakers fart out.
So I traded it in for a Standel amp (~1971) that was louder than either the acoustic 360/361 or the Ampeg SVT with fridge. That solved the problem even though I had to run it at comparatively low levels - volume on #3 (9 o'clock) indoors. Once you are able to bury them, that problem goes away and they start playing at more reasonable levels. Unfortunately, all that gear was stolen in 1976 along with my 1965 Fender Jazz Bass.
Now I use an 800-watt Eden amp driving a single DNS-410 cab by DNA and I fear no Marshall 4x12 double stacks and I don't need to haul around an 810 cab either. The amp is super clear, warm, full, and articulate. The cab is ungodly LOUD! It's SPL is rated at 106db @ 1-watt/1-meter. Odds are that's only on one frequency (usually 1K in most manufacturer's specs). To my knowledge only Mesa tests cabs with multiple frequencies and published an average SPL. Nonetheless, in real-world use, this cab is CRAZY loud.
I can't run my master over 9:30 indoors or outdoors unless the outdoors has a LOT of open area. When playing outdoor festivals I can run the master up to 10 o'clock. On top of the high volumes it produces, it is also the clearest, most articulate cab I've ever heard and it has a really tight low-end. Power handling is 1400-watts both thermally and mechanically. Maximum SPL is 137db and you wouldn't want to be anywhere near it at those levels.
I play in a couple of groups. One is a 5-pc with mic'd drums, two guitarist, keyboardist and myself on bass. the other is a Blues/Rock trio. I can bury either of them any time I want, although that is not what I want to do. I want to present well balanced instrumentation with clear vocals above that. That DNS-410 cab allows me that option regardless of what anyone else is playing through.
It's not cheap. Street price is right around $1049. Here's what I'm using:
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