Hi ,I did this summary on the CS3 and the CS3-E a few years ago.I had contacted Sanken Japan to send me a short comparison between the mics.This what they sent me. Comparison of CS-3 and CS-3e:
Self noise: yes, CS-3e has 2dB better noise than CS-3.
Let’s look at the two frequency responses of CS-3 and CS-3e (0 degree, on axis)
CS-3
In the case of the CS-3, frequency keeps flat till 200Hz, then starts to decrease in 3dB/OCT slope till 50Hz, and slope changes to 6dB/OCT below 50Hz.
When HPF switch to “ONâ€, then frequency starts to drop from 2kHz gradually, and from 200Hz decrease slope becomes 6dB/OCT, and below 40Hz slope becomes 12dB/OCT.
CS-3e
In case of the CS-3e, frequency keeps flat till 70Hz. then starts steep drop in approx 25dB/OCT. When “HPF†ON, drop starts from 180Hz until 80Hz slope is 6dB/OCT, and slope changes to 20dB/OCT below 80Hz.
REASON:
According to our research, and feedback from users, in actual use of shotgun, specially to pick up men’s voice in rich and full bodied sound frame, frequency response till 70Hz is essential.
However, from realistic point of view in practical “shotgun useâ€, frequency below 50Hz is not needed,it can cause more harm than good. Richest part of men’s voice is between 100Hz and 400Hz.The richest part of a woman`s voice is 300Hz to 1.5Khz.
But, in the case of the CS-3, frequency drop starts from 200Hz, and at 50Hz approx 8dB decreased from 200Hz.
And because of not steep slope, even in 20 Hz,the CS-3 still has comparatively high sensitivity, and it’s unwanted.
Therefore, in the case of the CS-3e, we have decided to keep flat response till 70Hz and have steep drop consciously,with the HPF ON, this drop starts from 180Hz.
This way, we aimed to get rich and full-bodied human’s voice, and reject unwanted low-end.
REJECTION of signal from other angle (sharp directivity):
When we look at the frequency graph,the CS-3 has 10dB reduction in the signal from 90 degree, at 100Hz, 200Hz, and 15dB in 500Hz and nearly 20dB or less above 1kHz. How about the signal from 180 degree?
10dB in 50 Hz, 18dB in 100Hz to 500Hz, and approx 20dB over 2kHz reduction.
The CS-3e, 90 degree, 10dB in 50Hz to 200Hz, 20dB in 2kHz and over 3kHz reduction is more than 20dB.
In case of 180degree, more than 10dB in 60Hz, more than 20dB in 200Hz, and keep this reduction till 10kHz.
THUS, we can see “sharp directivity†is kept in low-mid range in CS-3e.
Also, the E version has a more extended (more natural) low frequency response
than the original CS-3.
The “E†version has slightly lower self noise, but more importantly the reduction in noise is in the upper mid frequencies where the noise is most likely to be noticed (and the reduction most appreciated).
Joe
n.b.comments above from Sanken.
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