I might be wrong, but usually the preamps have 500mV input sensitivity, which will mean 66dB of gain required for the phono stage to bring 0.25mV to 500mV.
Going 62 dB instead will load the pre with 315mV at the input instead of 500mV.
Of course, the pre will pick up the task of amplifying to whatever the input level of the power amp is.
I dare to say that going with less than 66dB of gain at the phono stage level will work, only 66 dB will do better, signal to noise ratio wise.
Going 62 dB instead will load the pre with 315mV at the input instead of 500mV.
Of course, the pre will pick up the task of amplifying to whatever the input level of the power amp is.
I dare to say that going with less than 66dB of gain at the phono stage level will work, only 66 dB will do better, signal to noise ratio wise.