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View Poll Results: Do You Think Single-Ended Class-A Amplifiers Sound Best?
YES! 185 44.47%
NO! 77 18.51%
Nothing Special. Just Another Amplifier. 86 20.67%
I Haven't Seen Such An Amplifier. 68 16.35%
Voters: 416. You may not vote on this poll

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Old 22nd August 2009, 06:47 AM   #1
shaan is offline shaan  India
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Default Single-Ended Class-A Audio Amplifiers

(in case you don't know)

A Single Ended Class-A Amplifier is a class-a audio amplifier in which the output is controlled by a single device conducting through the entire 360 degree of the input signal... i.e. only a single Tube, power BJT or power MOSFET at a high bias current does the final amplification, making it the simplest audio reproduction circuit topology.

As everyone knows, these amplifiers are VERY inefficient(15%-25% or even as low as 4%), generate a LOT of heat, need costly power supply and BIG heatsinks to work properly.

HOWEVER, numerous claims say that this topology, often using NO global negative feedback, sound most natural and is above any and all amplifying topology used in audio amplifier designs.
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Last edited by shaan; 23rd August 2009 at 03:24 AM. Reason: Informing why one would read this message.
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Old 22nd August 2009, 07:38 AM   #2
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I couldn't submit to your poll... none of the responses cover my opinion.

Execution & synergy with the loudspeakers, i believe, play a bigger role. That said i really like my SE amps, but my favorite so far is Class A PP EL85 (triode) -- so many amps so little time.

dave
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Old 22nd August 2009, 10:26 AM   #3
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i have listened to pass labs f5 briefly and yes it sounds nice but class-d is not far off if not similar (depending on the rest of system of course, speakers etc.)

if you dont want an amp & heater combo go for class-d ... its the way forward IMHO
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Old 22nd August 2009, 10:27 AM   #4
shaan is offline shaan  India
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Quote:
Originally Posted by planet10 View Post
I couldn't submit to your poll... none of the responses cover my opinion.

Execution & synergy with the loudspeakers, i believe, play a bigger role. That said i really like my SE amps, but my favorite so far is Class A PP EL85 (triode) -- so many amps so little time.

dave
It's not like you must actually vote. You expressed your opinion and it says clear what it says- "but my favorite so far is Class A PP EL85 (triode)". Thanks for the opinion.
This poll is not public. Nobody knows who voted on which choice.
That said you could actually choose "No".
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Old 22nd August 2009, 01:13 PM   #5
Pano is offline Pano  United States
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I voted.
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Old 22nd August 2009, 03:23 PM   #6
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Quote:
Originally Posted by shaan View Post
You expressed your opinion and it says clear what it says- "but my favorite so far is Class A PP EL85 (triode)".
I do think SE amps are special, and no other PP amp but that one has surpassed a pile of SE amps. No is too harsh a response.

A more appropriate poll answer would be "it depends:

dave
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Old 22nd August 2009, 06:24 PM   #7
shaan is offline shaan  India
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Quote:
Originally Posted by planet10 View Post
I do think SE amps are special, and no other PP amp but that one has surpassed a pile of SE amps. No is too harsh a response.

A more appropriate poll answer would be "it depends:

dave
This is the case for people like you who has that PP Class-A amp at home. I understand the situation. For those who know that SE Class-A is inferior in as many ways as it is superior to other amps, but don't want to hurt it, there is a third option, choosing which will be as great a contribution to this poll as choosing any other.

misc:- The fourth option is almost unnecessary, but as it is also almost necessary to know who didn't hear about such an amp I kept it there, like "just another option", clicking which may contribute almost nothing. But there are people whose situations fall in that criteria; I made it an option to choose too.

Thanks.
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Old 23rd August 2009, 05:49 PM   #8
Jeb-D. is offline Jeb-D.  United States
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They do some things better, but some things worse. So I vote "just another amplifier", since "it depends" isn't an option.

Last edited by Jeb-D.; 23rd August 2009 at 05:51 PM.
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Old 23rd August 2009, 05:50 PM   #9
shaan is offline shaan  India
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Quote:
Originally Posted by Jeb-D. View Post
They do some things better, but some things worse. So I vote "just another amplifier".
To the point.


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Old 23rd August 2009, 06:27 PM   #10
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Quote:
Originally Posted by planet10 View Post
none of the responses cover my opinion.
same here.

as with most polls, the options are limited.

and yet, the results so far, are quite informative .


Quote:
Execution & synergy with the loudspeakers, i believe, play a bigger role.

this may be the most important factor, for what we are trying to achieve .

and,

what should be recognized, and gently ingrained into the 'noobs.
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