Rode NT2A Mods
The Rode NT1-A and NT2-A made substantial changes to the original Jim Williams circuit designs. Both the new mics utilized surface-mount components, and high capsule polarization voltage. The result is that both microphones had excellent specifications for self-noise.
However, both models are plagued by the "Chinese Microphone Syndrome," namely the use of a peaky and bright capsule with a linear circuit. While both capsule and circuit are excellent by any objective measure, the combination yields a sonic profile that can be hyped and piercing on some sources.
If you find your NT2-A to be too bright for your most common recording applications, we would normally recommend one simple fix: replace the mic's original capsule with our RK-47. However, the RK-47 does not fit the Rode mounting post/saddle. You would have to retrofit our short mounting post into your NT2A, in order to install the capsule.
Because that is more work than most DIY customers are willing to do, we have this alternative recommendation: replace the NT2-A capsule with our RK-12. It has a smoother top end, fuller lows, and a less-pronounced high-frequency presence peak than the Rode capsule. It will not give you a radical re-voicing, but should be more usable on more sources than the original. And it will screw easily onto the Rode saddle.