CONCOURSE C4
Frequency Response and Input Impedance
SPL
,1
W
/1
M(dB
)
Im
p
e
dance(ohms)
60
70
80
90
100
110
0
20
40
60
80
100
100
1000
10000
20000
10
0
10
20
0
10
100
Dire ctivity In dex,Q
100
1000
10000
Frequency(Hz)
20
100
1k
10k
20k
80.0
70.0
60.0
90.0
100.0
dBSPL
Frequency(Hz)
20
100
1k
10k
20k
80.0
70.0
60.0
90.0
100.0
dBSPL
Vertical Off Axis Frequency Response(down)
Frequency(Hz)
20
100
1k
10k
20k
80.0
70.0
60.0
90.0
100.0
dBSPL
Vertical Off Axis Frequency Response(up)
Horizontal Off Axis Frequency Response
Directivity Index (DI), dB
Directivity F
actor (Q)
40deg
0deg
10deg
20deg
30deg
40deg
0deg
10deg
20deg
30deg
40deg
0deg
10deg
20deg
30deg
A
TTENUA
TION (dB)
A
TTENUA
TION (dB)
A
TTENUA
TION (dB)
Concourse C4 version3 19/3/04 11:01 am Page 3
