Tube integrated with real bass. Does it exist?

As Jmcgrogan says above, VAC will get you great bass which will vary based on tube selection. If you want hit you in the chest bass and tubes you might look at integrating a good set of subs into the mix.

I will add that some 845 tube based amps will also give excellent with less efficient speakers - the Viva Solista and Mastersound Compact 845 are the only two I have used at home.

I think the key to Air Tight amplifiers great bass lies in their choice of transformers

Truemaineiac,
Any tube amp with descent active subs in the mix will have real bass.

09-15: Czarivey
Truemaineiac,
Any tube amp with descent(sic) active subs in the mix will have real bass

Czarivey, my apologies if my post was incomplete or obvious. I was attempting to convey that it will be difficult to get the level of bass that may be desired with tubes (and only moderately efficient speakers), and it may be worth considering subwoofer(s). I offer this observation in the spirit of helpfulness.

Inna, "I have never read of Jadis having great bass. Have I read wrong things or they improved in this area?"

Most definitely, you've read wrong things. Mostly, you don't find much to read about Jadis, as the US distribution over the past 20 years has proven lousy. There just aren't many owners out there.

Not to change the subject, but if you look at the Jadis power amplifiers, the transformers come across like Goliath compared to most other tube amplifiers.

I have 3 Jadis integrateds: the Orchestra Reference, DA30, and DA60. Though on par with most tube integrateds, the JOR and DA30 do not stand out for their low-end performance. The DA60, however, is an 85 pound beast, and when it comes to bass, a world beater. Though not on the same level as their power amplifiers, the transformers are a step or two above representative tube integrateds. Not to mention names and get folks' backs up, but I've owned more than half of the products suggested in this thread, and with the exception of a pair of burly monoblocks very few people have come across that were more or less its equal, the DA60 easily outmuscles everything else I've owned, tubewise - stereobloc, mono blocs, or what have you.