Gold wrote: ↑
Sun Jun 23, 2019 1:46 pm
JR. wrote: ↑
Sun Jun 23, 2019 11:59 am
I never tried or promised to make one flat with my old termination selector kit, only to approximate the design termination the manufacturer expected. A remarkable number of people playing vinyl back in the day were completely ignorant of things like cable capacitance, etc.
I'm not sure many manufacturers recommendations are based in practical experience. I say this because I have followed manufacturers recommendations on quite a few cartridges along with altering the values. I've never been able to flatten out or audibly improve performance by altering termination values. I can change the sound but it just never actually improves performance.
I've only had passing experience dealing with cartridge manufacturers and that was when I traded Shure some of my kit surround sound decoder delay lines in exchange for some V15s(?)... We were both happy with the trade... but they probably made out better trading me around $3 material content for $15-$20 worth of parts.
Years later at Peavey I recall talking with a senior ex-Shure microphone design engineer, when I took the opportunity to pick his brain about microphone termination philosophy. It was not very revealing but electromechanical transducer designs are apparently a basket of competing compromises.
I am glad phono carts are obsolete (or probably should be).
I expect microphones to be with us for a while longer, but I expect us to go full circle back to the bad old days when microphones (transmitters) were designed with their own dedicated preamps to linearize and flatten the transfer functions. Imagine what we can do with cheap DSP?
For example with a bright cartridge like an AT150MLX, typically by the time you add enough capacitance to get it anywhere near flat frequency response it sounds like a current starved TL072.
I am not sure i recognize that technical characterization.
This is done by ear while simultaneously cutting and playing back a lacquer.
Luckily no wiggle room for errors in that process...
PS: I apologize in advance to all that I may have offended with these comments.