Abbingdon Music Research LS-77 Reference Class User Manual
Page 19
19
Ideally we wish to keep the unavoidable contribution of the room sound over the direct sound below the
threshold where the room influenced sound overwhelms the direct sound.
The modular nature of the LS-77 OptiArray® system allows AMR’s setup to be scaled to almost any size
listening room. As the numbers of speaker pairs are increased in the Opti-Array configuration, the power
handling and SPL capability increase ever more dramatically over a single pair of LS-77s.
AMR recommends the following OptiArray Setups:
Room Size
<35m
2
25m
2
–70m
2
50m
2
-140m
2
100m
2
-280m
2
200m
2
-480m
2
System
Alpha
Epsilon
Iota
Omicron
Upsilon
(passive)
(passive)
(passive)
(passive)
(passive)
AM-77
1
1
2
4
8
LS-77 (pairs)
1
2
4
8
16
Power
360W
360W
720W
1440W
2880W
SPL (3m)
109dB
112dB
118dB
124dB
130dB
System
Beta
Zeta
Kappa
Sigma
Omega
(biamplification)
(biamplification)
(biamplification)
(biamplification)
(biamplification)
AM-77
2
2
3
6
12
LS-77 (pairs)
1
2
4
8
16
Power
720W
720W
1080W
2160W
4320W
SPL (3m)
113dB
116dB
122dB
128dB
134dB
*: OptiArray configuration