Thank you all - very interesting discourse. Clearly there is a lot of controversy surrounding phonostage preamplification and the current state of the analog art.
Regardless of whether one considers a commerical or DIY endeavor, what are the key design decisions that impact on phono preamp sound.
Secondly, how closely matched or restricted must the cartridge selection be to given a specific phono preamp selection.
A very low output cartridge needs 60 or more dB of amplification. How does one assess how much strain on the preamp this entails, how does that strain affect speed, resolution, transparency, and noise?.
Basically, how does one objectively break down the merits of a phono preamp design or upgrade and select candidates to listen to and purchase?