JBL Synthesis
System
Configuration
30
CAL NOISE is a special digitally generated signal to aid in calibrating the
Speaker Angle and Listener Position parameters. Note that in all cases,
sound will actually be produced by both front loudspeakers. The
adjustments affect the perceived directionality of the sound.
The SPEAKER ANGLE, displayed in degrees, adjusts for wide or
narrow speaker spacing (relative to the listening position). For the two
canceling signals to arrive at both ears at the same time you must be
centered precisely between the speakers. It will be easiest to calibrate
this parameter if you start equidistant from the two front speakers, even
if this is not your normal listening position. Once you have heard the
effect and set the speaker angle, the Listener Position parameter will
allow you to “move” the effect to your customary listening position.
To set the Speaker Angle, center yourself symmetrically between the
two front speakers. Turn CAL NOISE on and select LEFT ONLY. The
test signal should sound as though it is coming from off to your left side,
well beyond the left speaker, with near-total silence in your right ear. Still
facing forward, move your head from side to side until the effect is
strongest. When you have found this sweet spot you will notice an
almost physical sensation of silence in your right ear.
Now, select RIGHT ONLY. Again, shift your head from side to side to find
the sweet spot, this time looking for the point where the sound is
strongest in your right ear. Select LEFT AND RIGHT to determine if the
sweet spots from the left and right tests coincide. If they do not coincide,
return to the SPEAKER ANGLE display. If the first sweet spot is to the
left of the second, press
▲
; if it is to the right, press
▼
.
When calibrating right, if your left ear is in the
silent band, the speaker angle is correct.
NOISE
SILENCE
{
Move your head from side to side to find the
position where the noise is full left, and the
right ear hears near total silence.
NOISE
SILENCE
{
SPEAKER ANGLE is the angle between the
main speakers as seen from the listening posi-
tion — here it is about 60°. LISTENER POS
allows you to adjust for an offset listening
position.
60
°
L127
. . . Center . . . R127
▲
▼
Adjust with or
OFF
< | >
< | >
LISTENER POSITION
CAL NOISE
SPEAKER ANGLE
LISTENER POS
OFF, LEFT ONLY, LEFT AND
RIGHT, RIGHT ONLY
10
°
- 118
°
L127...CNTR...R127
SPEAKER DISTANCE
A/V SYNC DLY
CALIBRATE PANORAMA
L/R BALANCE
ZONE 2 BALANCE
