This is an
improved version of the old RIAA amplifier. This one is more true to the RIAA
curve. It falls to around -0.5dB at 20 Hz,
else it’s
pretty flat to 20 kHz. Output impedance is high and should be followed with my
line amplifier which has cathode follower
input. If
you have low input impedance, add a cathode follower like the output of my line
amplifier. The output stage could also
be replaced
with a SRPP or mu-follower.