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45 amps

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anyone powering their speakers with one of these? 2 watts or less? 

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People rave about 45s.  I built two SE DC amps ( 2015, 2016) , with a L.S.E.S. supply, and found the Type 45 tube to be lacking.   This was on a easy load to drive, versus many Klipsch speakers.

 

However, for most "typical" SE amps, ( capacitor coupled and with a traditional power supply ) you will probably be OK, because the tube's weaknesses will not be so evident. 

 

I see you are a newbie, quoting 2 Watts, so I assume you will have a common SE amp. 

 

I would question however the viability of a Type 45 tube, IF single ended, one tube per channel, on most stock Klipsch speakers.  I would suggest perhaps, a JJ 2A3 -40 amp, as the minimum for a Klipsch speaker, power wise.  The Klipsch speaker however, will need to have excellent wiring, all the way from the amp's output, to the drivers' voice coil connections. 

 

The areas that showed up needing improvement from my extensive listening ( 2015-2016 )  was the upper-bottom end of a piano, the "power" wasn't satisfactory to " me ", and there was a very shallow ( maybe subjectively 1/2 dB ) suck out, in the middle midrange, over a fairly broad area that was disturbing to me on music playback. 

 

Have fun.

 

Jeffrey

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On Khorns, a Jeff Korneff 45 amp can sound splendid. I haven't heard one on LaS, but assume they are efficient enough to be a good combination. As most of us know, room size and SPL requirements may render the 45 unacceptable.

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Thanks! yeah I'm kinda new. I have an Oliver Sayes 45 Korneff amp that  I tried in with my Hersey III, i thought it was great. I know people will say that all that matters.  Normally I use single driver Omega speakers with that amp.  They are all about the same sensitivity and all work well sitting near field which is most of my listening.And also understand that its not all about the sensitivity of the speaker.  Just curious if anyone else can get away with using only 2 watts. 

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2a3 versus 45...

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In my world 2 watts starts to approach high power territory.  And, you would be amazed at the sound of a flea power SEP with Klipsch speakers.  As I mentioned in your other thread, your Heresys on the desktop need such minuscule power that even 1 watt would give you as much headroom as you need.

 

 

Maynard

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Well the whole reason I'm bring this up is I'm getting a Thomas Mayer 45/2a3 amp.  I'm trying to figure out how to use it. 🙄 in my main system.  I'm considering a a pair of Cornwall IIIs.  In the past the 45amp worked for 90% of my  listening on all my 95, 98 db/m s. That 10 percent where it was lacking was when It sounded SO incredible I needed a little more.  

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Comparing 2A3 to 45 is ludicrous.  Listen to a well designed and constructed 45 amp first.

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More down low or more db?

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spending the afternoon with my 45 amp.  Like i rememberer it gets me there. MOST of the time. I do have a self powered sub for the lower DBs

IMG_2094.jpeg.18d485d21706c180efa7b44d22e46c0b.jpeg

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I been using a Korneff 45 amp for years with my Khorns and nothing has ever sounded better to me. I had a 300B for years in the same set up then tried the 2A3, they did not compare to the 45 amp not even close... 

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1 hour ago, canyonman said:

I been using a Korneff 45 amp for years with my Khorns and nothing has ever sounded better to me. I had a 300B for years in the same set up then tried the 2A3, they did not compare to the 45 amp not even close... 

 

 I agree and I regret selling my Korneff 45. I ran it with EML solid plate 45's. NOS 45's paled in comparison. If you try them you will be AMAZED. FWIW, I preferred the solid plate over the mesh plate.

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You guys think I could use Cornwalls III with good results? 

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Yeapers...

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What's the main differences in the tube characteristics between the 2a3 and the 45... 2a3 is capable of more output, correct?

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=== most 2a3 quote 2-3 watts (commonly 2.5) and the 45 typically at .5 - 1.5 ? Don’t quote me as this is from memory and I’m certain will corrected if in error —

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Those are ballpark figures l am familiar with also... I am just wondering if there are sound signature differences between the two tube types beyond just the output.

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2 hours ago, Schu said:

I am just wondering if there are sound signature differences between the two tube types beyond just the output.

 

That depends on whether the tubes are old NOS, or newer versions of 45 or 2A3. They all have their own sonic signature in there own way.

And it really depends on the circuit they are in, with the driver section being rather important itself. 

There are many variations of single-ended amplifier circuits using 2A3 or 45. Directly heated, or heated with DC...another subjective preference...

 

But I'll throw my opinion out...45 is little more euphonic than 2A3, with 2A3 more neutral sounding than 45.

This is with old brands of 2A3 and 45, like RCA and GE. The Sovtek 2A3 I have used were a little more neutral sounding than GE 2A3, with less euphonic sound than GE.

 

Figure room size as well...

 

 

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I am running a 45/2a3 direct coupled two stage amp and it has stayed in my system the longest of anything. 45 EML mesh has been my favortite tube but also run 245 globes, 2a3 RCA, and various new production 2a3's. Lots of iron hiding underneath and damper diode rectifiers in the back.

 

image.png.cde0ebb8e87750b904da00093c646014.png

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