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SP Controls, Inc.
Installation
Microphone Selection
Microphone Selection
The HF-100 accepts up to four (4) analog microphone inputs. Although the HF-100 will support
both dynamic and condenser types of microphones, condenser style ceiling microphones with a
cardiod pickup pa ern are most common.
Here is a list of ceiling microphones tested by SP Controls:
Manufacturer
Model
Pattern
Audix
M55 Series
Ceiling, Cardioid, High Output, 18-52V Phantom Power
8’ - 10’ Above Surface, 4 per 30’x30’ room.
Microphone Spacing
Microphone Spacing
General Strategy
General Strategy
From a technical standpoint, one must visualize a polar pa ern as the pickup on a microphone.
However, our Audix representa ve simplied the design by imagining a 10’ diameter “bubble” on
8-10
Feet
18-20
Feet
18-20
Feet
8-10
Feet
from
Walls
WARNING: Remove/unplug power prior to connec ng microphones or when changes to
phantom power se ngs.
