Panda amp - Page 3

Quote:

Originally Posted by Claus-DK 

I understand the nerdfactor very well, after all I am one, and the amp, could prabably be even better with some tweaks here and there, but the thing is, it is already very very good, so why bother ??

If you end up "only" getting an amp that is better on paper and sonicly inferior, then what has been gained ??

 

By all means I love improvements, but I just think it is the wrong way to do things, build it and then start tweaking it..If we just tweak it before we build it we cannot know if it is better..

the converse is that engineers are trained to use their knowledge of the state of the art to be able to reliably design circuits and choose parts to achieve some performance goal - did the original designer do any more than select the cheapest output Q that can handle the power - or do yau have evidence that they are carefully "voiced" by some audiophile "guru"?

taking measurable accuracy of signal amplification as a goal, and available parts suitable for the circuit topology - changing to 10x faster, flat hfe output Q and even faster, smaller driver Q would enable >10x less audio frequency distortion in the given circuit with "safe" adjustment of the compensation

there is little point in claiming you must listen to everything 1st before trying what engineering principles suggest gives better measurable performance - unless you propose to go through the 100's of transistor model # that would "work" in the circuit topology with careful subjective listening evaluation between all pairings?

From what I have seen of the products from HiFiDIY (where this amp is from), they have

some good ideas and engineering blunders in most of their designs. I have one of

their DACs and while most of it seems designed well, the ground driver is designed

really badly. In the end, it sounds OK but how much better would it have sounded

done right?
 

Quote:

Originally Posted by jcx 

 

Quote:

Originally Posted by Claus-DK 

I understand the nerdfactor very well, after all I am one, and the amp, could prabably be even better with some tweaks here and there, but the thing is, it is already very very good, so why bother ??

If you end up "only" getting an amp that is better on paper and sonicly inferior, then what has been gained ??

 

By all means I love improvements, but I just think it is the wrong way to do things, build it and then start tweaking it..If we just tweak it before we build it we cannot know if it is better..

 

the converse is that engineers are trained to use their knowledge of the state of the art to be able to reliably design circuits and choose parts to achieve some performance goal - did the original designer do any more than select the cheapest output Q that can handle the power - or do yau have evidence that they are carefully "voiced" by some audiophile "guru"?

 

taking measurable accuracy of signal amplification as a goal, and available parts suitable for the circuit topology - changing to 10x faster, flat hfe output Q and even faster, smaller driver Q would enable >10x less audio frequency distortion in the given circuit with "safe" adjustment of the compensation

 

there is little point in claiming you must listen to everything 1st before trying what engineering principles suggest gives better measurable performance - unless you propose to go through the 100's of transistor model # that would "work" in the circuit topology with careful subjective listening evaluation between all pairings?

JCX:

I know perfectly well what you are talking about, I have the same problem when eating icecream, I study them long and hard before eating them, as you might guess I have been producing icecream in my working life..

But I also do suspect that we do not know everything and I do not know if things can have synergi when paired up, which is better than using the "right" parts ??

Next time you are at Macdonalds try ordering a strawberry milkshake and use it to dip your french fries in, you will be surpriced with the result, which is very hard to believe before you try it...

Anyway I was in no way out to get or offend you, just wanted to provoke a bit and get a little more life into the thread, hope you can forgive me

I actually attended a "Ice Cream Seminar"  in college - an excuse to explore off campus - I have had Lowenbrau beer ice cream, and Fritos as mix-ins are among the more memorable

 How this amp work with high-resistance phones (300-600ohms)?

Very well, I have bulidt one with different output resitors one for low ohmic an done for high ohmic phones, it drives almost everything quite well.