Getting Started Quickly
0°
-110°
-30°
-120°
-100°
110°
30°
120°
100°
Place the loudspeakers at the correct angle
(ITU-R BS.775-1)
Place the loudspeakers at the same distance
r
For 2-channel stereo use ±30°
Delay closer loudspeakers by 30 s/cm
(76 s/inch)
Use the furthest loudspeaker as a reference
0°
-30°
-150°
-90°
30°
150°
90°
For 7.1 high definition systems
(no international standards)
r2
r1
tdel = 30 s * (r2-r1)
ref
Small near-field systems:
rmax = 4 m (12')
rtypical = 1 - 2 m (3 - 6')
rmin = 0.75 m (2.5')
rdiff
Large mid-field systems:
rmax = 8 m (24')
rtypical = 2 - 4 m (6 - 12')
rmin = 1.5 m (5')
Delays:
rdiff tdel
5 cm (2") 150 s
10 cm (4') 300 s
20cm (8') 600 s
50cm (20") 1.5 ms
1 m (3') 3 ms
Listening
position
Horizontal: Point loudspeakers at listening position
Use the acoustical axis as a reference
Symmetrical loudspeaker and object placement in the
room improves stereo imaging, d1,d2,d3
Keep back wall distance as
long as possible, d4
d1d1
d2
d3
d4
d2
d3
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