You'll be in for a surprise.
Most labels used their "own" cutting curve until 1958 - and even in 1964 the RIAA had to issue a reminder to the record producers that in fact they had agreed to use the RIAA curve and would all please use this from now on...
While they confirm they have not all curves ever used FM ACOUSTICS has researched curves of 85 different labels so far - all of which can be correctly reproduced with these phono preamps.
Once you hear the difference when the correct setting is used in comparison with the RIAA setting you will not want to listen again without correct curves. The difference can be larger than the differences in hifi systems.
Most labels used their "own" cutting curve until 1958 - and even in 1964 the RIAA had to issue a reminder to the record producers that in fact they had agreed to use the RIAA curve and would all please use this from now on...
While they confirm they have not all curves ever used FM ACOUSTICS has researched curves of 85 different labels so far - all of which can be correctly reproduced with these phono preamps.
Once you hear the difference when the correct setting is used in comparison with the RIAA setting you will not want to listen again without correct curves. The difference can be larger than the differences in hifi systems.