Two mics better than one?

[vidled]

This is directly related to THIS THREAD where there was a successful attempt on an HVX200 to replace one of the built-in mics with an Oktava MK012.

There are, however, four internal mics; two per channel; all four pointing in the same direction (upwards).
This leads me to wonder why this set-up is advantageous, exactly. The two mics per channel seem identical (small electret condenser mics), but one of them seems to have what appears to be a high-pass filter, the other one a low-pass filter. Then both mics are blended/mixed together (~ 50/50).

What would be the advantages of running two mics per channel like that?

 

[shawnmaddock]

haven't used the HVX, but...

We do this a lot mic'ing drums, especially hand drums. One mic for the high-end articulation, another for the low-end boom/thud/rumble/what-not. Ideally you have mics tailored for each frequency range, but in a pinch we still use two mics even if they're identical: the advantage is that you can adjust the levels (gain) independently, and get a good (natural) sounding mix instead of one eq peaking out the other. (People don't listen to drums with their ear against the head or the sound hole, even though that's where the mics are placed.)

I would guess that the HVX has some sort of normalizing built in to match the levels of the two, unless there are discrete outputs for each? Anywho, hope that helps...