That’s a Scott Frankland item, as far as I can tell. (Wavestream Kinetics)
his comment about requiring a 250kz-300khz basic or fundamental bandwidth, is true.
for, when one applies a equalization circuit of any kind known, to a circuit, to change the gain of the circuit as we scale the frequency ranges, we get an interaction with the LEVEL of the signal, at the same time. thus the unit is not stable in EQ level as we change the signal levels at high speed (class D output filter problem, and in the passive crossovers of speakers and so on, and on, and on) or when we try to create a dynamic and large leading edge to a transient.
Scott has put a sequenced (apparently) pair of individually overall 250-300khz bandwidth circuits.. into a pair of eq’d circuits, to recreate the RIAA curve. It’s why the better RIAA preamps break up the eq into two curves, so as to get past the transient phase and frequency integration problem. It’s why some circuits use a very large voltage (comparatively speaking) single rail power supply system for their RIAA circuits.
In the case of tubes it can be a +300 volt single rail. this, so that when the signal goes to a very high transient level, all the complex aspects of linearity have a chance to come into existence, all while unencumbered (as much as possible) by these gain circuit derived distortions. Again, the gain distortions are alleviated (strongly relieved) by the
circuits design (staged gain),
high bandwidth,
and high voltage rail... as a set of three fundamentally important things.
In the case of tubes, we also end up with an originally linear gain on the devices (tubes) themselves and avoid the generation of odd ordered harmonics in this overall complex in situ (for tubes) environment. Solid state is all odd harmonic distortion creation. very bad. (only the SIT and the V-Fet fix this impossible to ignore odd ordered distortion problem that exists with ALL known solid state electronics.)
four things, actually....
high voltage single rail power supply, (complex reasons why)
actual linear gain devices (tubes, SIT, or V-Fet)(complex reasons why)
High bandwidth circuits (complex reasons why)
staged gain circuits (complex reasons why)
so, FOUR things for ’best RIAA", on this planet ...in the known world of functional physics... as applied in an engineering application.
Thus dynamic and micro-dynamic scaling becomes linear at as well. something that solid state cannot do, as it is all non linear gain devices with solid state. Due to how the ear works and it’s innate sensitivity to absolutely minuscule amounts of odd order distortion, this point becomes at least as important as anything else, or in effect, truly fundamental in importance. like a functional rope requiring a middle part, this gain circuit requires a linear gain device to be in place, in order for the output of the overall system to be complementary to how the ear works.
Thus: RIAA? Done correctly, done in the most functional and perfect way known to humanity, for human ears?
Low noise high voltage rail power supply, staged gain circuits each with very high bandwidth...done with tubes.
Accept no substitutes.
And that’s all she wrote.
Problem is, human ears and the associated interpretive intellects, are all individual. Some will arrive at other ideas and solutions, and promote those ’solutions’..... even if those solutions are incorrect.
If those people live long enough,and continue working the problem long enough, and if their intellect and associated hearing capacities are good enough, they will eventually arrive at the place and space I’m talking about.
Since this combination is NOT the bulk norm in overall human society, you will find very few people doing it correctly... and very few people buying said correctness... and very few people accepting or promoting said perfected correctness.
The seeker of the esoteric limit is the odd person out.. and will be either maligned by the (audiophile) masses or not recognized to exist or both at the same time.
The pinnacle, in idealization and acceptance... of the mass center of the given group (yes, even here in high end audio)...will be what they recognize as perfection, which will not be correct. It is just their (mass as a group) limit peak, is all. A thing that their limits tell them is the full reach of reality. well, that’s just wrong. human growth as a continual action, illustrates this to them, if they bother to continue to grow.
The norm... is to not reach the limit... and to have the few peak people and peak situations be considered freaks ---by the larger mass of those less prone to do the work involved in seeking perfection.
Might and mass by no means has ever made right... and this certainly applies here, in spades. Sadly, it also applies to the greater world.
his comment about requiring a 250kz-300khz basic or fundamental bandwidth, is true.
for, when one applies a equalization circuit of any kind known, to a circuit, to change the gain of the circuit as we scale the frequency ranges, we get an interaction with the LEVEL of the signal, at the same time. thus the unit is not stable in EQ level as we change the signal levels at high speed (class D output filter problem, and in the passive crossovers of speakers and so on, and on, and on) or when we try to create a dynamic and large leading edge to a transient.
Scott has put a sequenced (apparently) pair of individually overall 250-300khz bandwidth circuits.. into a pair of eq’d circuits, to recreate the RIAA curve. It’s why the better RIAA preamps break up the eq into two curves, so as to get past the transient phase and frequency integration problem. It’s why some circuits use a very large voltage (comparatively speaking) single rail power supply system for their RIAA circuits.
In the case of tubes it can be a +300 volt single rail. this, so that when the signal goes to a very high transient level, all the complex aspects of linearity have a chance to come into existence, all while unencumbered (as much as possible) by these gain circuit derived distortions. Again, the gain distortions are alleviated (strongly relieved) by the
circuits design (staged gain),
high bandwidth,
and high voltage rail... as a set of three fundamentally important things.
In the case of tubes, we also end up with an originally linear gain on the devices (tubes) themselves and avoid the generation of odd ordered harmonics in this overall complex in situ (for tubes) environment. Solid state is all odd harmonic distortion creation. very bad. (only the SIT and the V-Fet fix this impossible to ignore odd ordered distortion problem that exists with ALL known solid state electronics.)
four things, actually....
high voltage single rail power supply, (complex reasons why)
actual linear gain devices (tubes, SIT, or V-Fet)(complex reasons why)
High bandwidth circuits (complex reasons why)
staged gain circuits (complex reasons why)
so, FOUR things for ’best RIAA", on this planet ...in the known world of functional physics... as applied in an engineering application.
Thus dynamic and micro-dynamic scaling becomes linear at as well. something that solid state cannot do, as it is all non linear gain devices with solid state. Due to how the ear works and it’s innate sensitivity to absolutely minuscule amounts of odd order distortion, this point becomes at least as important as anything else, or in effect, truly fundamental in importance. like a functional rope requiring a middle part, this gain circuit requires a linear gain device to be in place, in order for the output of the overall system to be complementary to how the ear works.
Thus: RIAA? Done correctly, done in the most functional and perfect way known to humanity, for human ears?
Low noise high voltage rail power supply, staged gain circuits each with very high bandwidth...done with tubes.
Accept no substitutes.
And that’s all she wrote.
Problem is, human ears and the associated interpretive intellects, are all individual. Some will arrive at other ideas and solutions, and promote those ’solutions’..... even if those solutions are incorrect.
If those people live long enough,and continue working the problem long enough, and if their intellect and associated hearing capacities are good enough, they will eventually arrive at the place and space I’m talking about.
Since this combination is NOT the bulk norm in overall human society, you will find very few people doing it correctly... and very few people buying said correctness... and very few people accepting or promoting said perfected correctness.
The seeker of the esoteric limit is the odd person out.. and will be either maligned by the (audiophile) masses or not recognized to exist or both at the same time.
The pinnacle, in idealization and acceptance... of the mass center of the given group (yes, even here in high end audio)...will be what they recognize as perfection, which will not be correct. It is just their (mass as a group) limit peak, is all. A thing that their limits tell them is the full reach of reality. well, that’s just wrong. human growth as a continual action, illustrates this to them, if they bother to continue to grow.
The norm... is to not reach the limit... and to have the few peak people and peak situations be considered freaks ---by the larger mass of those less prone to do the work involved in seeking perfection.
Might and mass by no means has ever made right... and this certainly applies here, in spades. Sadly, it also applies to the greater world.