Fender has mine. An obvious choice. They have everything that I need. I'm at:
American Standard Jazz Bass with rounds
American Standard P Bass with flats
Elite 5 string with rounds
77 Music Master with tapewounds
Mexican fretless with flats
what company are you committed to?
Just realized you didn't specify which Brand of Bass, just which Brand. Already said my Bass needed to be an MIA Fender Jazz (passive) with a 60's shallow-C shape neck with a 7.25" radius...so now how about amps?
I have had more than a few amps since I started playing in 1965. My First amp was a 1966 Fender Bassman and it was the "killer amp" until I started touring in 1971 and the rest of the group was using Vox Super Beatle amps - just buried my poor 50-watt Bassman. Then I upgraded to a Standel piggyback amp that has a 215 powered speaker cab. Blew the Fender away and I preferred it over the acoustic 360/361 and the Ampeg 810SVT (still made in the US at the time). Only had that amp for about 4 or 5-years before our house was burglarized (in 1976) and it was stolen along with my 1965 Jazz Bass and two Shure mics. I still miss that amp.
After everything was stolen in 1976, I didn't really start working my way up through amps again until 1997. Of course we raised a family with three kids in that almost 20-year space and there was no much $$ available for music gear. Slowly worked my way up form an old Yamaha 115 combo to a terrible GK Brat Pack (GK Backline 250 amp with a GK115bpx cab), then a Sunn Cab and then finally my first Eden amp. It was an Eden Nemesis RS400 and I still keep it as a back-up amp because it sounds so good. Was way too much power for the Sunn Cab though, so bought an acoustic B410 and stuck it on top of the GK115cab. That worked OK and I gigged with it for years.
In 2010 I bought an Eden WT500/800 (upgraded to 800-watts bridged by David Norschow) directly from David Nordschow, the founder of Eden. He had just started his new company "DNA" and had already designed a killer amp for it. He had used this amp on his test bench developing cabs for Eden before he sold Eden to USM.
Being a dual-powerblock amp I could plug onecompany's cab into each power channel and then use the balance knob to get the mix of sound I wanted out of the two of them. So the sound was even better with this amp driving it. Finally in 2015 I bought one of David Nordschow's new cabs, the DNS-410 by DNA . Best sounding and loudest cab I've ever played through or even heard for that matter.
I don't even need to consider using an 810 for Outdoor Festivals because I get told to turn down at festivals when I'm just using my DNS-410. My DNS-410 cab has a max SPL of 137db and with my 800-watt Eden amp driving it (cab will handle 1400-watts rms), I can't run my master above 9:30 indoors or even in an outdoor enclosed space. In an outdoor festival I can run it at 10 o'clock, but if I turn it up to 10:30, I get told to turn it down.
Even though that DNS-410 will handle everything perfectly, it scares the owners of small venues. So I went back to Eden and bought a couple of EX112 cabs at a very good price. I would use one for small venues, and a second one for easy load in and out at medium-sized venues. Used my RS400 originally to drive the single 112 venues and a little later bought an Eden TN226 amp (Class D, 225-watts rms) to drive it. When using both 112 cabs, I use my WT500/800 and plug one cab into each side (they are 4 ohm cabs). That amp with those two cabs sounds really good!
Then we played outside at that small venue where I usually use just a single 112 indoors, and it gave me the opportunity to bring out my DNS410. As soon as I started playing through it there, I knew I was missing the boat by not having a smaller DNA cab option. I decided the DNS-210 would be a good choice because it reputedly had the same sound characteristics that my DNS-410 had, just in a smaller size. Since I had bought my Eden WT500/800 directly from David Nordschow originally (was his test amp for developing cabs at Eden), I wrote to him to see I could be considered for his "Endorsing Artist" group. I got accepted to that and got a decent break on the price of the DNS-210, so I bought that and now only use DNA cabs at my gigs.
So my brand loyalty at this point is for anything designed by David Nordschow. That includes all the stuff from his first company, Eden, as well as for his new company DNA (David Nordschow Amplification). The DNA cabs are amazingly clear, articulate, full sounding, and LOUD with a very tight and full bottom end. They are a bit like Eden's D-series XST cabs on steroids. If you play bass chords with them, you can even distinctly hear each note of a 3-note chord.
I'm still driving my DNA cabs with my Eden WT500/800 amp because I have to save up for a bit to get the DNA-800 amp that I want. It's only 4.8-lbs instead of my 36-lb. amp with rack that I currently use, and it sounds great too. But with all my gigs cancelled for the immediate future, not sure when I'll be able to get that. I've made a point of only using gig money to buy new gear.
Here's a shot of my DNS-210 stacked on top of my DNS-410 with my Eden WT500/800 on top. It was the first gig I played with my DNS-210 and it's a large medium-sized venue. Wasn't sure my DNS-210 would fill it up and figured I could unplug the 210 and plug the speaker cord into the DNS-410 in a matter of seconds if needed.
Well, I certainly did NOT need to use the DNS-410. The 210 more than handled it. In fact, I had to move the stack farther away from where I originally set up because I'm a short guy and that 210 was almost aimed at my ears in a spot on the stage where it could only be about 3-feet behind me. Had to move it over and up to get my ears out of the 60° dispersion cone so it wouldn't kill my ears. With this impressive looking stack, the 210 provided all of the sound and the 410 ended up being nothing more than a very expensive amp stand for the gig: