Downunder, nice video - thanks for the link. As for the A90 mounted and shown in action on a tonearm parallel to the record surface - I can shine a light here.
Ortofon's own test records are cut with the highest cutting angle in all cutter heads - thus the tonearm has to be parallel with standard mount cartridge in standard headshell.
In general and in any case - I do not want to spoil any "search-for-perfect-SRA-party", but finally it is always about the position of the polished area of the stylus towards the groove walls.
And this position is a variable one - not fixed, unless you only play records all cut with the same angle (i.e. - one manufacturer and one time period).
Since there are a wide range of cutting angles in records past and present, we either settle on a good compromise (which in turn is optimal for only ONE specific cutting angle) or adjust the position of the stylus to each cutting angle.
Those discussions have been made before and the two schools will never settle nor unite, but it is at least pretty clear that there is no such thing as a universal perfect SRA nor VTA.
Not in this world of record cutting angles differing by up to 8 degrees.
The stylus have to be aligned "groove-compliant".
Ortofon's own test records are cut with the highest cutting angle in all cutter heads - thus the tonearm has to be parallel with standard mount cartridge in standard headshell.
In general and in any case - I do not want to spoil any "search-for-perfect-SRA-party", but finally it is always about the position of the polished area of the stylus towards the groove walls.
And this position is a variable one - not fixed, unless you only play records all cut with the same angle (i.e. - one manufacturer and one time period).
Since there are a wide range of cutting angles in records past and present, we either settle on a good compromise (which in turn is optimal for only ONE specific cutting angle) or adjust the position of the stylus to each cutting angle.
Those discussions have been made before and the two schools will never settle nor unite, but it is at least pretty clear that there is no such thing as a universal perfect SRA nor VTA.
Not in this world of record cutting angles differing by up to 8 degrees.
The stylus have to be aligned "groove-compliant".