Tube DACs


For some time I've assumed that tube DACS are meant for direct output to power amps -- in other words, no reason to use a tube DAC if you are running through a tube preamp (unless all components are by same mfr and designed for synergy).

But lately I have seen posts implying some run Brand A tube DAC through brand B tube preamp -- say, Primal Luna 100 to Rogue RP-9. Can't find any prior threads addressing this topic directly.

So, question: am I wrong to suppose that pairing random tube DAC A with random tube preamp B is a bad, or at least a silly idea, absent a known synergy?
 


S

 

hickamore

Obviously if a DAC has a tube, the tube has nothing to do with digital. It is usually a cathode follower for impedance matching to the device the DAC is feeding and it's there to color the sound to be tube like(otherwise it's colored solid state like).

@allanblissett volume control inside a dac is often done digitally,  and if done right causes no loss of resolution. 

AFAIC tubes should be in every possible gain or buffer stage. 🙂

There are many great solid state preamps. Nothing wrong, at all, with using one. I still prefer high end tubed preamps. When I have compared similar prices ss and tubed preamps I have preferred the tubed… they have a more natural and musical presentation. There are probably exceptions.

Controlling amps directly from DACs is not a thing yet. Many people have tried it and most have abandoned it. You end up with great details and a sterile sound. I suspect over the next twenty years this will slowly change as digital dominates the market and analog becomes less main stream.

 

But for now, unless you want to put out a lot of money, a lot of research time and probably buy you DAC (non-tube) and amp from the same manufacturer, it is better to assume you need a high quality DAC and Preamp.

All components have a sound. Tube DACs were not designed to eliminate the preamp any more than a tube phono pre is. Yes tubes into tubes could get too tubey but if they are well designed they will probably work fine. No generalizations are possible.

I have a Black Ice tube DAC (new purchase, very happy) playing through a Raven integrated tube amp. Sounds really good, starting to rival my analogue front end.

It has a gain control, which doubles as a volume control for headphones. It is not designed to be connected directly to a power amp as far as I know.

I went with a Tube DAC with the intention of tube rolling, which I did immediately. Huge change after adding some NOS Mullard’s. Done for now.

No reason not to use a Tube DAC with a SS amp. Or the converse...my phono stage is SS. IMO the Cart/TT does the sound shaping and I wanted a clean, quiet transfer from the PS.