Array Design - Meyer Sound CQ-2 Specification Sheet

Array Design

Creating an effective array with the CQ requires a
precise understanding of how to combine the coverage
area and SPL of the individual speaker with those of
adjacent speakers. Array design is a trade-off between
increasing on-axis power and creating smooth transitions
between the coverage areas of adjacent speakers.
As the splay angle (the angle between adjacent cabinet
faces) decreases below the coverage angle of the
individual speaker, the on-axis power increases, but
the coverage overlap between adjacent speakers causes
comb filtering and other frequency response variations.
As the splay angle increases toward the coverage
angle, the on-axis power decreases, but the variations
in frequency response diminish. As the splay angle
increases beyond the coverage angle, noticeable gaps
begin to form in the array's coverage area.
NOTE: The trapezoidal shape of the CQ does not
represent the horizontal coverage area of the speaker
or the intended splay angle for horizontal arrays. The
20 angle of the CQ enclosure is narrower than the
minimum recommended splay angle.
Number of Horizontal
CQ units @ Angle 1
Coverage Max Peak
H V
Number of Vertical
Rows of CQ @ Angle
1 80 40
2 @ 0 (LT) 80 20
2 @ 15 80 45
2 @ 30 80 60
2 @ 40 80 80
Number of Horizontal
CQ units @ Angle 1
Coverage Max Peak
H V
Number of Vertical
Rows of CQ @ Angle
1 50 40
2 @ 0 (LT) 50 20
2 @ 15 50 45
2 @ 30 50 60
2 @ 40 50 80
14
CQ-1 Array Coverage and Maximum SPL Chart
2 @ 50
Coverage Max Peak Coverage
dB SPL H V dB SPL H
136 100 40 140 150
142 100 20 146 150
140 100 45 144 150
139 100 60 143 150
138 100 80 142 150
CQ-2 Array Coverage and Maximum SPL Chart
2 @ 30
Coverage Max Peak Coverage
dB SPL H V dB SPL H
139 70 40 143 90
145 70 20 149 90
143 70 45 147 90
142 70 60 146 90
141 70 80 145 90
A series of outdoor tests was conducted at Meyer Sound
to determine the coverage angle and on-axis SPL for
arrays with one and two horizontal rows of up to four
elements each, at numerous splay angles. The measurements
were conducted at a distance of 8 m with half-space
loading; on-axis SPL values were interpolated from
8 m to 1 m. The coverage angle for the array is the result
of averaging the –6 dB points from 125 Hz to 8 kHz.
The horizontal splay angles in the tables below represent
the optimal configurations for narrow and wide coverage
areas; note the different angles for the CQ-1 and CQ-2.
The vertical angles represent the optimal narrow (15 ),
middle (30 ), and wide (40 ) orientations for both the
CQ-1 and CQ-2. The 2@0 LT denotes the long throw
configuration: the two horns are coupled directly
together (top speaker upside down/bottom speaker
upright) to form a single narrow horn.
The following tables show the SPL and coverage areas
that result from grouping the CQ-1 and CQ-2 in arrays
of up to four units horizontally and two rows vertically.
All splay angles refer to the angle between cabinet
centers. If this information does not address your
application requirements, contact Meyer Sound to
obtain additional information on array design.
2 @ 70 3 @ 50
Max Peak Coverage Max Peak
V dB SPL H V dB SPL
40 139 170 40 140
20 145 170 20 146
45 143 170 45 144
60 142 170 60 143
80 141 170 80 142
2 @ 40 3 @ 30
Max Peak Coverage Max Peak
V dB SPL H V dB SPL
40 142 100 40 144
20 148 100 20 150
45 146 100 45 148
60 145 100 60 147
80 144 100 80 146
3 @ 70 4 @ 50
Coverage Max Peak Coverage Max Peak
H V dB SPL H V dB SPL
220 40 138 220 40
220 20 144 220 20
220 45 142 220 45
220 60 141 220 60
220 80 140 220 80
3 @ 40 4 @ 30
Coverage Max Peak Coverage Max Peak
H V dB SPL H V dB SPL
130 40 144 130 40
130 20 150 130 20
130 45 148 130 45
130 60 147 130 60
130 80 146 130 80
4 @ 70
Coverage Max Peak
H V dB SPL
141 300 40 139
147 300 20 145
145 300 45 143
144 300 60 142
143 300 80 141
4 @ 40
Coverage Max Peak
H V dB SPL
145 170 40 144
151 170 20 150
149 170 45 148
148 170 60 147
147 170 80 146