Maybe that could be the “loudness switch” of the future; to have the option toggling between a balanced harmonics type of sound and a technically accurate sound.
Someone probably already has it.
Someone probably already has it.
I meant in terms of current supplied and thermal issues an often used reason for going discrete. The circuit is fine the base current recapture in the mirror offers a tangible benefit (it has been used in IC's for several decades). I'm just saying this function discrete vs. integrated has little difference.
Bob Katz already does. His effects box "Blender" was discussed in this forum 10 months ago: May 2018. After publication on the website InnerFidelity.
There is no H2 H3 blend. It just happens when you control the amount of GLOBAL NEGATIVE FEEDBACK that most amps will give some H2 and some H3 as a residual. First: H3 is the MINIMUM that you can have, IF you have any minimum distortion in most designs. H2 is just what you get because complementary devices are not really perfectly matched, even with a Class A output.
Presumably, you mean in your designs. Other designers may do some things differently than you do in terms of how they tailor the harmonic structure, as one of them happened to describe to me in moderate detail.
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Yes, and he said to me there are a number of things he can adjust to fine tune it, then went into further detail about it.
In any case, there can be NO H2 H3 ratio except at one output level. It will ALWAYS change with different amplitude. This is because H2 follows a linear increase law, and H3 follows a square law in their relative increase with level.
Sure. Probably makes it sound better that way, a more dynamic sound. 3D, some might say. Works good for guitar pedals too, gives it some 'swish.'
Hi John.
What levels and ratios of H2/H3 do you find are good enough/useful ?.
Do you design for subjectively optimal/acceptable H2/H3 ratio at particular operating levels away from max power rating ?.
What is your take on the subjective 'damage' or 'excitement' caused by each of H2 and H3 nonlinearities.
Dan.
Thank you Mark.
Katz's Corner Episode 25: Adventures in Distortion | InnerFidelity
(the “Comments” section –plus the links-takes longer to read than the article but it is equally important as the article)
George
On my experience, lot of ICs "sound" lot better this way on the output stages. More flexible sound, less tense. Even with 10K loads.
Capacitive loads with limited current during transients ?
Wouldn't that depend on the recording? A flexible, bendy sound would sound equally soft and relaxed on a hard, stiff amp, would it not, with the added advantage that a firm, rigid sound would be able to be reproduced in all it's glory?
If you're looking to reduce OLG by tinkering with external components only, Sergio Franco's book (link to inexpensive paperback edition) presents an excellent circuit approach, in Figure 8.24 (p.375) of the Third Edition. To find it in other editions, go to the chapter on "Stability" (ch.8) and find the section on "External Frequency Compensation" (sec. 8.4). There it is.
BTW I doubt that this is truly "the best" way. I'm sure there are company proprietary trade secrets that cannot be mentioned here, which are even more bester.
I promise you the opposite is true, there are tricks to enhance OLG. This whole theme is a nonsense and always has been.
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