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When I perform a Time Domain simulation using V4, 1mV, 1KHz, the peak signal at node "stage5" is 2.179 for a gain of 579 -- reasonably close to the designed gain of 551.

However, for the Frequency Domain simulation using V4, 1Hz to 4kHz, 20 points/decade, node "stage5" shows a gain loss of -8dB at 1KHz. In fact, the entire graph seems wrong.

Playing around with other op-amp models (such as TL081) does seem to give more consistent results. Why does my custom model work fine in the Time Domain but not for the Frequency Domain?

https://www.circuitlab.com/circuit/9bvkme/sensor-coil-amplifier-filter/