Sonic qualities of SET output tubes?


Can you readily identify a 300B, 2A3, 805, 211, etc., amp’s sound with your eyes closed most of the time?


If so, I’sure would like to hear from you.


Amplifier design and the technology utilized within its confines decides the ‘voice’ or influence it will yield as much or more so than merely the output tubes the designer has chosen to use.


I get that part emphatically. One must hear the amp regardless the type of output tube technology on hand.


And yes, some Pentodes and Tetrodes are used as Triodes but are not indeed triodes by their specific architecture. That’s OK, just focus on their use as Triodes herein, please.


There are however certain tube types, irrespective of vintage which have basic undeniable sonic colors or characteristics, apart from their electrical aspects which keep attracting people to amps which use this or that tube in its output stage.


Some love 211s. some adore 300Bs. Some love EL34s configured to run as Triodes. I have an affinity for the latter. So far anyway. This topic could change my mind.


Has your own experience informed you what this or that output tube’s natural flavor regularly announces itself to be so you can have a reasonable expectation of its general presentation?


What sonic attribute continually attracts you to a particular SET tube design, 300B or some others?


Or, conversely, what is it about the sound that would bring you to covet a 211 amp over a 2A3, for example.


Why as another example, would you pick a 2A3 amp over one using 805s or 300B, 211, etc. or vice versa?


Removing ‘vintages’ and electronic or electrical qualities from the argument, what sonic attributes for the more popular S.E.T. amp output tubes have you determined seem to persist in their particular DNA?


I’m asking for input from those SET tube devotees to lend their experiences and knowledge on the subject of what tube sounds like what irrespective of the SET application, generally speaking.


My goal is to try getting a better feel for which SET Tube amp design, if any, I’d want to pursue and possibly invest heavily into going forward as the soul of a new system.


Tremendous thanks to all!

blindjim

Hi Bill (Brownsfan)

It's so good to see you posting again as I always appreciate your insight. I do believe that the Total Eclipse and your Triumph are easier to drive than your SV II speakers. I'll admit that you listen to more demanding music more often than I do as another factor. I'm a jazz guy and you're classical. I very happy to read that the Atma-Sphere mono blocks are just a better fit for your needs. The Frankenste
in and TE

 Charles, no doubt your speakers are much easier to drive then my old TVll's.  Your speakers do not show up used very often, if at all. I used to look for them a couple of years ago. 
Bill,
Yes, you may see a pair of the Total Eclipse for sale once in a blue moon. Your TV II were a complex design relatively speaking. 4 way, 3 crossovers, 9 drivers( mixture of brands as well) I  believe including ribbon tweeter.

In contrast the TE was a simpler 3 way with minimalist crossover, 5 drivers (all Scanspeak) just fewer parts and more straight forward. Really two different concepts in a sense. There’s only a single capacitor at the tweeter and no resistor at that site.I replaced the stock Solens with the Duelund CAST (that you recommended years ago, thanks 😊). Just beautiful sound.
Charles
Having just getting a custom SET - DHT preamplifier the Russian 4P1L
Tube used for amplifiers as well as preamplifier is considered by many possible 
The most linear tube . Granted it can be microphonic if not built properly but
Radu Tarts has built many pieces of gear. My preamp has 0 coupling caps 
Lundahl Transformers snd chokes  and only Munfotf 4pole csps snd bypassed 
Khozmo relay based shunt volume . This SET preamp is the best I have had and I have owned many $$ well respected models .which gave several gain stages.
SET amps,and preamp only have one amplified stage then output That's It !!
You will hear what's on the recording . With the Amplifier low power is the only limitation ,the preamp has no dynamic limitations $2-5k is the average for a custom  built preamp.