Do all audio amplifiers really sound the same???

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That's only because of the differences in the green tint in the bottles. But if they were all put in the same bottle and used some charcoal filtering (to even out inconsistancies of the bric from different regions and years and different oaks), blend and serve over ice while eating matzos.....

They would all taste the same.
 
Re: Amplifiers

Miles Prower said:


Actually, "the other way round" is quite possible, as I've done it myself. The trick is to use huge amounts of gNFB. Put 20+db(v) of gNFB on a hollow state amp, and it will sound just like a solid state amp. With one project, the gNFB is variable from none at all to 12db(v). Dialing in the whole 12db(v) is definitely headed towards a solid statey sound.

I've listened to lots of valve amps and find them not able to reproduce fast transients and complicated sound tracks correctly.

I believe a poorly designed valve amp will sound better than a poorly designed solid state amp but I could not find a valve amp yet that could compare with a good solid state. (I like your hollow state 😀)

Maybe you can comment on this.

eastcoast said:
I personally feel that way about cables, I see people spending thousands on cables, saying that it's really opened up the sound etc. It's wire dude, it carries electricity. So long as it is carrying current/signal sufficiently, (big enough that there is no substantial signal loss) you are essentially saying that you can hear the difference in silver vs. copper (no sound is transmitted through it, just elec) because the speakers care which metal transmits the signal...I don't think so. You can claim you hear this or that, but when it comes down to it, you just think you can.

The more revealing your system get, the more difference you will hear on different cables.
 
KP11520 said:
Michael, maybe it is time to make a new thread to develop this test!

I will. But I think more people are interested in arguing about it than actualy testing.

But maybe we can get some good arguments going over what and how the test should be, and that will lead to a better test. We shall see - and hear.
 
Re: Re: Amplifiers

Andre Visser said:
I've listened to lots of valve amps and find them not able to reproduce fast transients and complicated sound tracks correctly.
That's because you're listening to output transformers (or in the case of OTL, poorly matched loads). Tubes are much faster than transistors. Try building a ZOTL or driving ESL panels directly with an HV tube amp. There's nothing slow about it.
 
Re: Re: Re: Amplifiers

abzug said:

That's because you're listening to output transformers (or in the case of OTL, poorly matched loads). Tubes are much faster than transistors. Try building a ZOTL or driving ESL panels directly with an HV tube amp. There's nothing slow about it.

I agree with you about the output transformer but I hear the same "problem" with hybrid amps and also valve pre-amps.
 
Well then you're hearing something else, maybe coupling capacitors. That a tube would have problems with transients sounds nonsensical. Maybe what you think of fast transients is some form of distortion in solid state amps. Listening to a hybrid with tube output directly driving electrostatic headphones is the closest I get when listening to a classical recording to being in the local concert hall (both of which I do quite frequently). Tubes have enormous slew rate and the amp in question has closed loop bandwidth of 400 kHz.
 
eStatic,

It really is just a matter of memory, driven by long experience of live music unaided by electronics, a liking for complex music, an ounce of musical ability, and some intellectual effort - and it is not infallible.

It is quite easy to determine a dip at 100Hz because you can't hear the 'cellos.

A boost between 1kHz and 2kHz has the trebles shouting into your ear trumpet.

Something unpleasant at 5kHz to 6kHz makes the violins sound as if they are being bowed by steel wire rather than horsehair.

It is not difficult to determine that the BBC Philharmonic have better intonation, timing, and tone than the Orchestra of Opera North. That's why I don't go to the concert series in the local concert hall any more. Would one be more certain if they both were on the platform at the same time, sharing desks, and playing alternate phrases? I find that such A/B testing just doesn't help.

Its easy enough to hear that the Bridgewater Hall has a better acoustic than Huddersfield Town Hall - just sit where you can look up (down?) the bell of the trombone.

A good violinist at least knows when they have made a nasty noise, hence all the practice

None of this seems unusual to me, I have a number of friends and acquaintances who are much better at it than I am. Learning from them helps me to refine my listening.

Your very considerable abilities as a composer and software writer place you way, way above the 99th percentile. Those reading this thread may wish to look at this one

Regards,

Andy
 
panomaniac said:


I think more people are interested in arguing about it than actualy testing.

I for one want testing.

I am prepared to pay for it.

If I can get 99 other contributors for the same amount I will put up $100. Much more than that I'd find hard to justify to my family.

We'll give the $10,000 to an independent organisation to perform the testing. It's not actually a great deal of money. I suggest a university, as that will feed into supporting some researchers, they have a ready population of test subjects, and we'll probably get a good deal.

I suggest cables as the first target for testing, as this is probably the most contentious area. If the money stretches, we can move on to other equipment, or maybe we can get more than 99 contributors.

Who wants to put their money where their mouth is?

w
 
Re: God is in the Nuances

Nikolas Ojala said:
Have you read this: http://www.stereophile.com/features/203/index.html

If you really did read it through, what are your thoughts about it?
I'm unable to find any published research of the experiment mentioned there. Now, they mention that the author was not yet ready to publish, but this was back in 2000. Surely if there weren't any significant problems with that research, it would have been published.
 
Re: God is in the Nuances

Nikolas Ojala said:
Have you read this: http://www.stereophile.com/features/203/index.html

If you really did read it through, what are your thoughts about it?

Poor writing. Lots of logical errors (straw men, false dichotomy/excluded middle, question begging, omission of crucial details). Par for the Stereophile course. They're in the business of selling magazines, not doing analysis.
 
SY said:


No, it won't.

AMEN!

A short while ago a local guitar maker compared a 2N3819 common source amplifier vs a TL072 in pickups. Several instructors at Berklee, two experienced Luthiers, and other trained musicians either could not tell the difference or had no preference. No big deal, I just found the story interesting in light of how intensely the audiophile community still fights this battle. I've given up, just like I've given up arguing with people who believe Peter Belt.
 
Maybe we can ask the moderators to change the name of this thread to.... "Purgatory!"

panomaniac said:


I will. But I think more people are interested in arguing about it than actualy testing.

But maybe we can get some good arguments going over what and how the test should be, and that will lead to a better test. We shall see - and hear.

Just keep the Bandaids and Neosporin handy. Amd maybe a razor too just in case we have a "Rocky" here (cut me Mick)!

I think I'm going to switch from bananas to popcorn. Let me go make some so I have something to eat during the "entertainment!"

Regards//Keith
 
Re: God is in the Nuances

Nikolas Ojala said:

If you really did read it through, what are your thoughts about it?


Nikolas,

the Ackermann test would drive me to distraction, starting with the chosen music.

Ackermann's research model as a psychotherapist may or may not be correct; however both my parents are dead and I have an adult, unmarried, child to continue to support emotionally. So I don't have his prescribed set of emotional needs to satisfy via my purchase of sound equipment. So that was a waste of time for me personally.

Limited frequency response is a real turn-off. If the notes disappear off the bass end of your system then you can't hear the music. If you don't have good top end then the nuances such as he described are not reproduced. I believe he contradicted himself, but haven't the energy to check it out.

Accuracy is hugely important for large scale romantic works. If you can't hear what is on the page, how can you know what emotion the composer intended? That applies to the performance, and, for home listening, the recording and the reproduction. Soundstage is only important when it is thoroughly bad, and just irritates you. None at all is better than bad in that aspect.

When one listens critically to a piece of music which is unfamiliar, accuracy, once again, is important. Playing familiar music for emotional enjoyment (particularly relaxation) is usually just prompting your memory of that music, so accuracy is less important. Your brain knows what it sounds like, other bits of the brain can be engaged elsewhere.

The tone and content of the letters bear a close resemblance to the politer posts on this thread; probably the most interesting part of wading through Mr Sauer's rather patchy article and woolly conclusion.

Thanks for an entertaining half hour.

Long post because long article(s),

Andy
 
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