Tube integrated with real bass. Does it exist?

+1 on both Rogue and Atmasphere. Great bass is non-negotiable for me and both really delivered with APPROPRIATE speakers.

Coincident dragon monoblocks . (Almost) Purity of SET with great bass. Lot of set enthusiasts also use this as a bass amplifier .

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.