Me saying that TVCs sound different is a world away from saying what you are trying to imply, ie that all TVCs have an affect on the sound quality. My claim is that the very best TVCs are as near as makes no difference the same as a wire but with gain control.
You have not disproved that.
Instead you seem to suggest that active pre amps are better than TVCs. Whilst the very best active preamps might indeed be better in measurement terms (and how they sound) compared to the worst examples of TVCs you have in no way shown that the best TVCs are inferior to the best active preamps.
I am really picking you up on what I perceive to be you tarring all TVCs with the same brush.
A TVC is a winding of a particular metal wire. Due to the fact that it is a winding, it has levels of capacitance, resistance and inductance. Depending on how much wire is used, the gauge of the wire and the quality of the wire, those capacitance, resistance and inductance number will vary greatly. Also, Impedance varies when you attenuate the signal via a TVC too. That will also have an effect.
Therefore, your winding (TVC) will have measurable and audible differences to other windings.
The same is true of cables, cartridges, SUTs and TVCs. It is a fact, and I'm afraid it's a fact that doesn't change just because you spent a shit ton of money on one.
You may have a better quality winding in your MFA, than one found in say a £30 AliExpress one, but you still have Capacitance, Resistance, Inductance and variable impedance, and that will cause differences in how they perform sonically. They are not immune from these influences, which my "fuzzy photo" clearly enough demonstrated.
It's not a case of tarring every TVC with the same brush, it's about understanding them and why they sound different to each other.
You cannot escape it, and it will have some effect on what you hear. Hence the veil on the Chord Dave.
Also you do realize that by using the Dave straight into the amplifier that you used it's inbuilt volume control?....a silicone chip.
You have also stated the MFA was veiled (to a degree) in comparison......to a silicone chip. A £10 digital volume control chip.
My original, and somewhat now lost point was that this idea that TVCs are flawless, "signal in, signal out" or "wire with gain" is not correct. It's measurably and evidentially not true.
As I have previously stated, I am not running SUTs or TVCs down, and I do understand their appeal from a sonic perspective.
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