JBL SDP-75, Руководство пользователя

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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.