So, it is about your question, not my previous answer you tried to challenge?
Sometimes people in your position get emotional and take all the (negative) responds as if coming from one individual...Oh no, that sounds psychological. Here is a Psycho-acoustics you can learn from the OBL11 thread:
"Does the front grille fabric influence the sound? From measurements the deviation is <0.5 dB. But psychologically the front grille may take some adjustments as we are so used to being able to view the drivers from our speaker system. All of a sudden we're forced to rely on our hearing alone and our brains don't have any visual information "helping" (e.g. fooling) our minds on what is going on."
Okay, may be you mean that a tube amp should be able to drive a big 3-way with complex crossover. On that, here is what he had to say:
"Can the OBL-11 be driven from your 8 wpc 300B amp? Yes, if you don't play particularly loud. Does the Audio Mirror 20 wpc amps sound more dynamic? Yes. Does the Jungson amp - 80 wpc - really kick butt? Yes!"
For me, LM3886 is not measure good. Slew rate to low, THD at 20kHz is relative high. In local audio community, I always advice to person who started build discrete solid state amplifier to compare with LM3886 or LM1875. If their amplifier sound worse than the chips amp, it failed. The design is not good.
My preferences when I design an amplifier are:
1. Make slew rate high as possible.
2. Make good harmonic profile of the distortion. Monotonic more preferable.
3. Make THD at 20kHz as lower as possible.
4. Make THD do not change too much with frequency and power level.
5. Make S/N ratio as high as possible.
Of course, there are always some trade-off.
My preferences when I design an amplifier are:
1. Make slew rate high as possible.
2. Make good harmonic profile of the distortion. Monotonic more preferable.
3. Make THD at 20kHz as lower as possible.
4. Make THD do not change too much with frequency and power level.
5. Make S/N ratio as high as possible.
Of course, there are always some trade-off.
So, it is about your question, not my previous answer you tried to challenge?
Oh no, that sounds psychological. Here is a Psycho-acoustics you can learn from the OBL11 thread:
"Does the front grille fabric influence the sound? From measurements the deviation is <0.5 dB. But psychologically the front grille may take some adjustments as we are so used to being able to view the drivers from our speaker system. All of a sudden we're forced to rely on our hearing alone and our brains don't have any visual information "helping" (e.g. fooling) our minds on what is going on."
Okay, may be you mean that a tube amp should be able to drive a big 3-way with complex crossover. On that, here is what he had to say:
"Can the OBL-11 be driven from your 8 wpc 300B amp? Yes, if you don't play particularly loud. Does the Audio Mirror 20 wpc amps sound more dynamic? Yes. Does the Jungson amp - 80 wpc - really kick butt? Yes!"
With 94 dB SPL sensitivity speakers you can play most of the music at realistic level (classical, jazz, acoustic in general) at half the power of the 845 ampli.
That was.
Summarizing the listening session:
- 4/5 people don't know anything about audio (they don't know what is a DAC or an amplifier)
- 5/5 people have good musical education (2 play an instrument as hobby, 1 is piano teacher)
- 5/5 people frequently attend live events
- there was nothing to sell (no commercial interest)
- 5/5 people found the system with the 845 amp much more realistic than the system with the LM3886 amp
- 5/5 people found the system with the 845 amp enough realistic and close to the live event
- the 845 amp has much more distortion than the LM3886 amp
So, does people like distortion?
Maybe, I don't know and mostly I don't care.
Ordinary people (although with a decent musical education) likes listening to music rather than to the audio system.
I learned from this listening session rather than from what you are pointing out.
I would consider this listening group (me aside) as objective as possible since they have nothing to do with audio, they don't know what is an audio system, they don't know what are measurements, they merely listen to music.
I honestly think that you are not ready to learn something. You can't imagine that what you are experiencing now, I have experienced 30 years ago. You just don't know yet what you will learn in the next 30 years
True, almost as good as the Italians nicking noodles from Asia and making hundreds of different shapes and calling it cuisine.
Of course he isn't. Or he would realise all his spouting on low phase noise clock audibility for the nonsense it is. Or at least would be honest and say he was doing it for lolz and there is no audible improvement.
Many should note the word 'preferences' here. This is the correct way to make a point. I don't agree with some of the above but It's a preference so all is good.
True, almost as good as the Italians nicking noodles from Asia and making hundreds of different shapes and calling it cuisine.
Of course, you have measured the culinary qualities.
Italian cuisine is world’s most popular | YouGov
"British cuisine is regarded as unpalatable across mainland Europe. While 91% of Britons say we like our own national cuisine, fewer than half of those in the other European countries agreed."
But measurements tell another story.
I don't know about that noise clock story. But I have observed that people that came here for a "mission" will be so emotional when someone gets in the way. Most people here I believe is for learning and sharing and being in disagreement is not a big deal.
I'm still waiting to know the wonderful tools you have used to claim that there is no audible improvement.
My poor tool has measured some OSCILLATORS just in the same manner they are measured by Wenzel and Oscilloquartz.
But since this way seems to be wrong I'm still waiting to know what is the right tool to be used.
Absolutely. And when they descend to cheap shots you know they are not interested in sharing. He's been on my ignore list for months which makes these threads a lot calmer to read as I just see the quotes.
Sorry, in Italy we measure with the palate (and maybe even in all the other European countries).
So I cannot post a plot.
Do you really know that? I think you don't.
If you want to characterize the distortion of an amp, then at what operating point? You'd have to step the DC operating point through the range of output current and output voltage, then step the test signal frequency and amplitude. As I've shown with my simple example, it is easy to build a circuit which has very low THD at the DC operating point (Vout=0V, Iout=0A) but 100x more THD at a small Iout offset from that. And a zero-centered THD test will completely miss it.
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