Tubeguys:How much "tube sound" from tube players?

John, I'm amazed that you find the Rowlands more 'tubey' than your CAT's. Are you just referring to tone, that is the Rowlands are warmer? I'm dying of curiosity why you would be buying all those 6550's if otherwise. :-)

I suspect that you are using the description of the effect of tubes differenty from how many would define 'tubey' when comparing the CAT's and the Rowland, vis a vis the last sentence of your post, which is my definition of one of the effect of tubes which is for the most part missing from SS devices.

One of the reason's I recommended consideration of a well implemented passive line stage is, assuming comparable quality of the attenuator, you need only match a good (assumably tubed but not necessarily) CDP with your chosen tube amp and speakers.

In the end its all about synergy, speaking of which - While the following combination of equipment would hardly rise to your expectations on either a tonal or resolution quality basis, and frankly surprised me as well, I recently combined a Wadia 302 with a Primaluna 3, the SFM's and my Tylers. The net result was excellent resolution/imaging, warm tone, full tight bass, and totally non fatiguing to listen to. It was most impressive with a solo piano when listening to the bass/lower mid-range to hear clearly all of the impact of the piano AND clearly hear all of the decaying resonances from the sound board as well as the wooden body of piano and the acoustic. So many times what we get is either too much bloat from slow rise times, too much resonance from slow decay, or the opposite. Since putting those components together I'm seriously re-evaluating what it is that I think I need from my system beyond that sound. If it were not for the phono stage of the SP10 I think both it and the BAT CDP would be retired. Now, after that admission, no one will ever take me seriously again! :-)

As Tvad points out there's more than one sonic attribute that we tend to identify with tubes. One of these being a more warm midrange, i.e., greater emphasis in the lower mids to portray a richer sound from what we otherwise might identify as "neutral". This is the attribute I was referring to with the Rowland amps vs. the CATs. The CATs do not at all have this sonic character; they are very tonally coherent.

Another major attribute at play here has to do with the portrayal of space, ambience, longer decays, etc. This has been THE one thing I have chased in a system for nearly 20 years now. I find that tube preamps affect this character far far more than tube amps. I have gone through ARC Classic 60, Classic 150, VT130, Wolcott and CAT JL-3 tube amps, and the only amps here that significantly conveyed these attributes were the VT130 and Wolcott. And all of these use the 6550 tube except the Wolcott.

The VT130 was the most awesome performer in this area .... and even more so when I tried KT88 tubes. But the Classic series amps were not at all. Even the hybrid (tube input, ss output) Counterpoint NPS400 has more of this than the ARC Classic series.

Unlike the ARC Classic series, the JL-3s are never fatiguing due to an overly forward projection into the room. And with these being Class-A circuit designs, I would expect them to be more similar than different but just using 6550 tubes does not imply the resultant sound will be remotely close from one amp to another.

As for why I stay with the JL-3s with all their tubes, this is easy: I have yet to hear another amp that does the dynamic contrasts and renders the leading edge of each note like this. There is a ton of detail coming through because of the response of this amp. And when the music gets complex, the subtle details in the background do not get washed out because the power supply can't keep up.

The Aesthetix pieces do the dimensionality magic like no other I have yet experienced. But they need a little bit of help in the dynamics and frequency-extreme coverage. Some recent updates to the Io by GNSC has reduced this issue significantly, and I hope to go another round on this and then perhaps with the Callisto too. A tube amp like the VT130, Wolcotts, Atmasphere, Manley and most likely VTL, would be a little too much of a good thing for me. So I match this preamp up with an amp that does the dynamics and transients like no other. And the sheer resolution of this allows the Aesthetix magic to come right through. I tend to think of this more as a balancing act rather than synergy.

John