This is a design circuit that can be used to produce a pre-amplifier with accurate RIAA response, this circuit use two stages of amplifier. This circuit is more complex than single op-amp RIAA pre-amp, but the performance is excellent in terms of accurate frequency response. This is the figure of the circuit;
The circuit uses LM833 high performance op-amp from National Semiconductor, giving the best performance of 0.1 dB response curve error, compared to the standard RIAA curve. [Circuit diagram source: National Semiconductor Application Notes]
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