SET Asylum

RE: 6SN7/26/45

89.216.143.180

gordan

In Reply to: RE: 6SN7/26/45 posted by JANDG on April 05, 2009 at 16:15:40

sorry i have no schematics, the amp wasn't built by me - i'm not a builder however i gave some directions.

as to limono's remark about no speakers that can have a "drive" with 2a3, 45 or 801a, we may have different ideas about "drive" - but in terms of what amps and speakers do, a combo of my 801a (A2 class, 3-4w) and 114db horns (oris swing) is only dependable on what's happening upstream. this means that my vinyl playback has tons of "drive", while digital,..... grrrr...... just occasionally.

btw i have to correct myself, my input tube is E280F not E180F, i'm constantly making this mistake.

Follow Ups:

114dB - Donald North 17:48:05 04/07/09 (5)
I find 114dB/1W/1m efficiency across the audio range hard to believe. Does anyone have some calibrated measurements graphs to support this claim?

Donald North
- it is deceptive.... - JeffreyJ 06:39:10 04/08/09 (4)
  the upper horn is 114dB... I don't find that the hard to believe number... well, easier to believe... the hard to believe number is the the bass being 114dB.. 114dB down to 30 Hz required a large, long horn... so he does this by using an amp built into the speaker for the bass... so the bass is significantly lower in sensitivity, but boosted to the upper horn level with the amp...
  
  so, with one watt, he gets 114dB out... it's just that the one watt isn't directly driving the bass... no different than some other manufacturers... Avant Garde and myself included (on occasion)... just think of it as biamping with the bass amp built-in... then the customer only has to provide a flea powered amp...
  
  Peace,
  Me
  - exactly. - gordan 07:41:32 04/08/09 (3)
    a bass section is amped. that's the only way to reach the efficiency of an upper horn in reasonable domestic conditions. i have no backyard do build a 20m concrete horn for bass.
    
    i really don't know if 114 db efficiency is a correct number for oris swing but i was told that it is, and it behaves like that - certainly more efficient subjectively than avantgarde duo i've heard. i guess lots is to be jugded from a driver chosen - BMS 4592ND.
    - swing - roli10 04:57:24 04/14/09 (0)
      For what stand for the way the swing speaker enclosure
      Why it is built like that?
      Thanks
    - RE: exactly. - Donald North 11:00:17 04/08/09 (1)
      What powers the midbass-bass section: tube :) or transistor :( ?
      
      Donald North
      - RE: exactly. - gordan 15:19:47 04/08/09 (0)
        
        In Reply to: RE: exactly. posted by Donald North on April 08, 2009 at 11:00:17
        
        gainclones, 30w
E280F - somejoe 06:06:09 04/06/09 (1)
Is the E280F triode strapped or run in pentode mode?

TIA,
- RE: E280F - gordan 10:43:59 04/06/09 (0)
  triode, though i may ask my tube guy to reorganize a circuit and try it as a pentode
RE: 6SN7/26/45 - limono 05:58:24 04/06/09 (1)
Gordan
Sorry for trolling hehe. Your're right of course and I use 98dB Jensen coax and some Klipschorn bass bins (too less extent)with plenty of "whoomp" (less with K-Horn)on 45 amps. But once you hear proper 10-20W SET or better,50WPP DHP point of view "swings" a little.

PS I thought that you sold "Oris Swing" and commisioned a "no compromise" 4-5 way all round front horn loaded speakers?
- RE: 6SN7/26/45 - gordan 10:42:52 04/06/09 (0)
  Limono,
  Strangely I tried 211 SET in my system. The amp is made by the same guy who built my 10Y/801A (Tatic Audio, Serbia) and despite more of the thorium light which is nice, I preferred a lower powered 801A amp. Truth to be told, the 211SET had a coupling cap and the PSU wasn't as elaborated as mine (solid state rectified, mine is with U52), but if that demo of a work-in-progress 211 unit is anything to judge from, in my room I don't miss any drive. However I have to add that my speakers' performance is short from perfect because the room is too small so I keep them too close to a back wall so it's really a question what kind of improvement is needed so I can hear it.
  
  OTOH, I have no experience with really powerful amps with my speakers. Apart from the SET, most of the time I spent with F3. I tried briefly a dedicate BD-Design gainclone, 30w, not my cup of tea. Actually I was pretty shocked how this amp grabs the Swing's balls - a few 2A3&300b designs I tried here were far from it.
  
  As to the "state of the art 5-way", could be that I was tripping. I have no room for that. Even my poor Swings are suffering in 22m2. Also, I believe I know nothing about horns to be able to make them better the Swings which are after all a truly extraordinary speaker. I yet have to hear a better one but there's a million I haven't yet.

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