The speaker/amplification wars continue


SET amplification vs PP amplification
High sens speakers vs ~`The INEFFICIENTS~~~
You might think this topic belongs over on amps room. Not at all. 
SET + High sens (91db-120db)
PP + Low sens = The Inefficients (below 91db)
Sunday I hope to get Richard Gray's 211 SET amp he builds in his shop.
This will be my 1st ever exp with SET amps, Not once have I heard a SET amp.
I know now what a  PP can do. 
I have various FR 91ish db speakers for testing.
Thinking it all over.
My only concern is classical music, Specifically full orchestra rocking N rolling. 
While listening to my Defy 7 6550, the orchestra is not separated, its all blended, like a  Louisiana Gumbo.
I'm guessing RG's 211 will bring  in details which a  PP amp just can't manage. 
I am not sure ,. just guessing here. Now all the YT vids on SET amps, have easy jazz, solo instruments, nothing complex whatsoever,. 
So obviously I will not test with my usual reference cds, Gatemouth Brown Gateswings, nor Sophie Milman. ,,well no actually we will start with Gatemouth, as his cd is high chaged with  thick stuff going on, Lets see ifa  211 can handle its business.
Next I will test the 211 witha  bunch of high quality classical, Rip Roaring full orchestra. 
Will tghe 211 pass with colors and separation and SLAM! or will the big bad boy go down in flames , all discobobulated and coughing its guts out.
Will post results. 
If SET wins, Defy is up on the auction block, actually ~buy now,/ships free~Going to takea hit on that one, as i have $1500 in upgrades, amp is from the early 2000'ish? . , amp hardly used, . Maybe 3-4 yrs  
mozartfan
is this the online version of staring into the mirror and talking to yourself for an hour?

good grief

wolfie62
185 posts
05-14-2021 12:34am
This is a very strange and weird post by the OP.

~~~~~~~~~~~~~~~~~~~~
~~Unusual~~ I agree
~~But strange/weird~~~, maybe you are not interested in this subject, and that I can understand.
So taking the 2 above comments , not as ~snides~ but as honest, fair and open free speech ..I took it easy and thought about my next move.
Obviously there are no fish biting on this topic and so I am just going to have to fish in other waters..
Lets see the Inet perhaps have some fish, = a  good answer.
So I type in 
~~Weaknesses of SET amplification~~~
and what do I catch?
None other than 
~Steve Hoffmans's page~
Oh its a big one.
And note 
~THis topic has been CLOSED~
Seems this topic is highly sensitive (pun intended) material, hush=hush.
Let me state at the get-go
I only employa  few jazz cds for the excellent record quality as testing cds, to ck the performance ofa  amp, speakers, tweak, upgrade.
Other than  for these pirposes, I  listen exclusively to classical, chamber yes, but also full orchestra.
Note the opening question.
My answer has been found. 
SET amplification will  have less than satisfactory results, when the music calls upon, power and muscle.
Jadis Defy7 will remain in place. 
paired with a  97b full range and  dual 87db midwoofers.
Had wolfie62 held back his free, fair open speech, I might not ever have typed this Q to the Inet's vast info recorded log.
I have not read through this topic on Steve Hoffman's page, the OP  gave me all I needed to know.
I will most likely let Richard know  that I have lost interest in his 211 SET.
Ohh I just peeked to the 2nd post, 
Futher affirming what I feared might be the result of the SET experiment.

Thanks Wolfie62 for inspiring me to make further research. You've been a big help
;--))

https://forums.stevehoffman.tv/threads/pros-and-cons-of-set-single-ended-triode-systems.136051/
and let us not  forget, 
Both Einstein and Jung were labeled as *wierdos* by their colleagues. 
~~~~
I Get by with alittle help from my friends, 
I get by with alittle help from my friends
Joe Cocker
It sounds like fun doing this sort of listening shoot outs, but, I hope you don't draw broad conclusions from the results.  At best, you can say this or that particular amp, running a particular set of tubes, in your particular system, and in accord with your particular taste, was the best.  You will have just one set of data in the evaluation of particular approaches to tube amplification.  

From my own experience, I would not conclude that one particular approach is the best.  I own two pushpull amps--one using the 45 tube, the other 349 (i.e., both amps are low-powered), and I have owned and heard many other pushpull amps.  I also own a parallel SET amp (2a3) and have heard many other SET amps, including those that run 211, 845 and other somewhat higher power tubes.  Note that many of the cheaper amps out there running the 211 and 845 do not run them at the very high plate voltages that the tubes are capable of running (a good thing, given how dangerous this can be if not properly constructed).  I have also heard about ten different output transformerless (OTL) amps.  If I were forced to pick favorites, my top picks would be a custom made OTL amp and the pushpull Western Electric 59A amp (runs extremely rare 252 tube).  Among the amps I own, I like the pushpull amp running 349 output tube (essentially a rebuilt Western Electric 133A amp) the most even though it is not nearly as expensive as the parallel SET amp.

At least as important as the basic topology is a whole host of other factors, such as the quality of the parts (particularly output transformers), the basic design choices, and tubes utilized in the amp.  Like anyone else into the tube game, I have my favorites, although this does not necessarily mean that anything else is out of the game.  For example, with respect to tube types in pushpull amps, I tend to like 6L6, KT66, EL34, and EL84 tubes over the likes of 6550, KT88, KT120 and KT150 tubes.  For SET amps, I like 45 and 2A3 tubes over the popular 300B.

There are no outright winners and losers in ANY give aspect of tube amp designs.