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11.3 IMPORTANT RECOMMENDATIONS FOR
MICROPHONE PLACEMENT
REQUIREMENTS FOR THE MEASUREMENT ENVIRONMENT
At least a few basic rules should be respected to ensure a robust measurement:
• No obstacle between the speaker and the microphone.
• No highly reflecting surface (leather sofa, glass table…) close to the microphone.
• No background noise during the measurements (Air conditionning, open doors, windows etc…)
• No movement during the calibration (disturbs speaker localization)
REFERENCE MEASUREMENT POINT
The SDP-75 supports single-point and multi-point calibrations. In both scenarios, a reference measurement position
should be chosen carefully since it will be used by the Optimizer for:
• Cross-over driver alignment
• Loudspeaker relative delay/level alignment
• Master delay/level calculation
POSITION AND ORIENTATION OF THE MICROPHONE FOR
THE REFERENCE POINT
The calibration microphone should be placed at the listening position, using the listener’s ears as a reference for its
height. A red led shows the front of the microphone. The red led must be pointed to the front of the sound stage, towards
the center speaker.
During the calibration process the microphone should be attached to a microphone stand or a camera tripod.
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