For a 630mH cartridge with 150pF/47k loading, you have a fairly ideal setup with no peaking at all.
Sorry, I must disagree. Of course there are different views about optimal loading but if the
goal is to achieve critically damped system having no peaking in the frequency domain and no
ringing in the time domain, this is the formula for the optimal input resistance:
R(opt) = L/(2sqrt(LC) + RC)
R = Series resistance of cartridge coil
L = Inductance of cartridge coil
C = Cable capacitance.
If L = 630mH, C = 150pF and R is not known but assumed to be negligible, we get 32k.
And of course if R is taken into account this value is even lower. So, if 47k is used the
system is clearly under damped with brightness and restlessness in the sound...