JBL AV1 - Manual (Page 75)

AV1
Setup
3-37
CALIBRATING OUTPUT LEVELS
Selecting the SPEAKER SETUP menu LEVELS CALIBRATION option
opens the LEVELS CALIBRATION menu, which is used to calibrate
output levels for the audio output connectors. Calibration ensures
that output levels correspond to THX reference levels (75dB) for
input sources such as DVDs.
Note the following to ensure accurate output level calibration:
• Use a Sound Pressure Level (SPL) meter to calibrate output lev-
els. An SPL meter is a device that measures the relative loudness
of the speakers to ensure accurate output level calibration.
• Before output level calibration begins, eliminate extraneous
noises in the listening space, such as conversations, air condi-
tioners, and sounds that filter in through open doors and win-
dows.
• Before output level calibration begins, remove objects and peo-
ple that obstruct the line-of-sight path between the SPL meter
and the speaker being measured.
• Output levels should be calibrated from the primary listening
position. Place the SPL meter at the approximate spot where
the listener’s head will be during listening.
INTERNAL NOISE TEST
Opens the INTERNAL NOISE message shown above, which indicates
that the internal noise test produces loud calibration test signals.
When this message appears, press the
arrow to open the
SPEAKER LEVEL ADJUST menu shown above and conduct the internal
noise test or press the
arrow to close the message without con-
ducting the internal noise test. When the SPEAKER LEVEL ADJUST
menu opens, the internal noise test automatically begins.
SPEAKERS SETUP LEVELS CALIBRATION
MAIN MENU
MODE ADJUST
AUDIO CONTROLS
SETUP
SETUP
INPUTS
SPEAKERS
REAR PANEL CONFIG
DISPLAYS
VOLUME CONTROLS
TRIGGER
LOCK OPTIONS
SPEAKER SETUP
CUSTOM SETUP
THX SETUP
SPEAKER DISTANCES
LEVELS CALIBRATION
C
R SR RR
L SL RL M
SUB
0.0 dB 0.0 dB 0.0 dB
0.0 dB
0.0 dB 0.0 dB 0.0 dB 0.0 dB
LEVELS CALIBRATION
INTERNAL NOISE TEST
EXTERNAL NOISE TEST
BASS PEAK LIMITER
INTERNAL NOISE
!CAUTION!
HIGH AUDIO LEVELS
SPEAKER LEVEL ADJUST
FRONT LEFT
CENTER
FRONT RIGHT
SIDE RIGHT
REAR RIGHT
REAR LEFT
SIDE LEFT
SUBWOOFER +0.0dB
+0.0dB
+0.0dB
+0.0dB
+0.0dB
+0.0dB
+0.0dB
+0.0dB
SPEAKERS SETUP LEVELS CALIBRATION INTERNAL NOISE TEST