Kijanki, the difference between audible enhanced even and odd ordered is something like this: with the evens, we start to hear that they are there with about 0.5 to 1%. With the odds, we are well aware of them when they are about 0.0005% or so.
The evens can be canceled by fully differential balanced operation. Its not a great benefit to have the output of the amp be push-pull if you don't do it throughout because all the gain stages make distortion. So if you operate fully balanced throughout the circuit, the overall even-ordered harmonics will be very low or non-existant.
After that you do your best to not enhance the odd orders- zero feedback, class A operation, minimal gain stages, higher quality components, more linear amplification (triodes as opposed to pentodes for example) and so on.
This, BTW, is one of the very clear 'audio advancements' that has occurred in recent years. There are tube and solid state amplifiers that use these techniques today; thirty years ago they did not exist.
The evens can be canceled by fully differential balanced operation. Its not a great benefit to have the output of the amp be push-pull if you don't do it throughout because all the gain stages make distortion. So if you operate fully balanced throughout the circuit, the overall even-ordered harmonics will be very low or non-existant.
After that you do your best to not enhance the odd orders- zero feedback, class A operation, minimal gain stages, higher quality components, more linear amplification (triodes as opposed to pentodes for example) and so on.
This, BTW, is one of the very clear 'audio advancements' that has occurred in recent years. There are tube and solid state amplifiers that use these techniques today; thirty years ago they did not exist.