JBL SYNTHESIS SDP-40HD - Manual (Page 79)

SDP-40HD Setup
3-39
CALIBRATING SPEAKER DISTANCES & OUTPUT LEVELS
The SDP-40HD offers calibration of speaker distances and output levels. Calibration helps to ensure accurate output signal arrival time and level
at the primary listening position. However, it is not a substitute for proper speaker placement.
Before calibrating speaker distances and output levels:
• Set crossover points for the Main Zone audio output
connectors. Setting crossover points afterwards could
invalidate calibrated output levels (the CUSTOM or THX SETUP
menu can be used to set crossover points).
• Eliminate extraneous noise in the listening space, including
conversation, air conditioners, and sounds that filter in through
open doors and windows.
• Move or remove people or objects blocking the path between the
microphones or SPL meter and the speakers.
SPEAKER CALIBRATION PARAMETERS
The table on the next page indicates the speaker calibration
parameters that can be used to set speaker distances and output
levels for the speakers connected to the corresponding Main Zone
audio output connectors. These parameters are available on the
speaker distance and output level menus shown throughout this
section.
SPEAKER DISTANCE PARAMETERS +0.0 to 30.0ft or 12.0m
Reflect the distance between the primary listening position and the
speaker connected to the corresponding Main Zone audio output
connector.
OUTPUT LEVEL PARAMETERS -18.0db to +12.0dB
Reflect the output level of signals sent to the speaker connected to
the corresponding Main Zone audio output connector.