Ok...gonna try and congeal some of the replies you've received thus far and give some context to
why those replies are coming in the way they are.
Thank you for the reply. I'm sorry if my question wasn't full enough. What I'm looking for is high end ( hand wired/botique) amp , mainly studio, my main bass is a first gen peavey palladium 4 string, blues, country , rock , soul/RandB, these are the speaker sizes i like for bass , 6,8,12, 18. I don't care about size or weight those are trivial, mainly high quality, great tone , reliable, no distortion, oh and i don't like a trebley bass sound . I like two rock amps for guitar and Gretsch USA drums , something at least in league with those
Now we're talkin'! (....bass

)
Ampeg B15 is a highly-famous amp for studio recordings. Getting an original in good condition may be tough, but plenty of folks out there could service it back to respectable condition. Ampeg SVT is also pretty ubiquitous, and there would be PLENTY of clean volume on tap paired with the Ampeg 8x10 cab. You could tone it down by going for the Ampeg SVT 4x10 or SVT-212AV though.
Mesa, Gallien-Krueger, Orange, Genzler, Markbass, Aguilar (and many more)....all premium, high-quality amp companies with excellent products. They've all got different flavors of "great" though. I'll second the Noble and REDDI suggestions though (and throw in Origin Effects Super Vintage), as many famous recordings were direct to board or via preamp, the aforementioned DI/Preamp boxes are fantastic. Hell, some studio and live gigs have been rocking the $249 Sansamp Bass Driver DI to GREAT results for
decades. Look it up if you haven't heard one before!
Speaker size tells you nearly nothing useful in the bass world (except how heavy it might be), plenty of threads on that here. I know with guitar cabs you can nearly throw any speaker into a cab with the right size holes and it'll work decently well, bass cabs/speakers don't work that way at all. You can outright damage speakers if you're not careful with what you're putting them in. Don't focus on speaker size, focus on the response curve and sensitivity of the cabinet in question.
"Hand-Wired" is not a definitive marker of superior quality in the bass world...at all. How do I know this (besides personal experience)? The guy who designed the Mesa Subway line (and several others before I was even born) replied to this thread earlier saying that. If AgedHorse tells you something, you can take that to the bank
I wouldn't worry too much about taming the treble...if you've done studio work you probably know a LPF usually gets applied to bass somewhere in the mixing/EQ process. Even the Treble knob on most bass amps works in a similar fashion. You can even roll off the tone knob on the bass to do just that. Multiple ways to dial out the clank if you're not looking for that in the final product.
Turnkey solution for bass? I'd just grab a decent Fender P-bass, Noble or REDDI DI (again, might wanna look at the Origin Effects Super Vintage and Sansamp Bass Driver or VT Bass too) along with a good compressor. Some folks even skip the preamp and just do bass -> compressor -> board to great results. If you're dead-set on getting an amp though, and money is no object, I'd probably find a good condition or restored Ampeg B15 if I were in your shoes. SVT is great, but that can be a lot for a studio setting IME. If you want to tame the treble as well, you may want to think about outfitting that bass with flatwounds instead of rounds...especially if you're going for the B15