Shure ROSWELLITE KSM353 - Manual (Page 5)

With directional microphones, bass response increases as the mic
is moved closer (within two feet) to the sound source.
This phenomenon, known as proximity effect, can be used to
create a warmer, more powerful sound. To prevent explosive low
frequency sound during close-up use, the KSM353 bass response
gradually rolls off. This provides greater control and helps the user
take advantage of proximity effect.
To protect your microphone, keep a few simple precautions in mind
to ensure long term performance:
1. Store your microphone in its protective case when it is not in
use. Leaving the microphone lying around will expose the ribbon
element to dust and other airborne particles that can adhere to the
inner assembly and decrease performance. This advice stands for
all high quality studio microphones!
2. When setting up the KSM353, maintain a reasonable distance
from fluorescent lights, power transformers, and other strong
electromagnetic sources to avoid hum.
3. This is a full-sized microphone. Use a secure mount and stand
and a good quality balanced, shielded XLR connecting cable.
4. Phantom power is not necessary and should not be supplied
when connecting or disconnecting the microphone. However,
properly supplied phantom power will not harm the microphone.
CARE AND HANDLING
PROXIMITY EFFECT