The Primo EM273 is similar to the EM272 but with higher SPL handling (135 dB vs 119 dB). Also, the simpleP48 doc has a few ideas about increasing the SPL headroom of some capsules.
EM273 is a 3-terminal version of EM272.? ie it is EM272 modified as on page 12 of SimpleP48.pdf dtd 29sep24 for use in SimpleP48RCA.
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This, with EM273 has MUCH better overload performance and should be used if you are having overload problems.
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I'm playing with some LTspice sims of SimpleP48RCA and it looks even better than I thought; at least in SPICE world :)
