Appendix, System check - references, Appendix 15.1. system check - references – d&b D80 User Manual
Page 76
15.1. System check - References
Typical impedance (Z) values
The following table indicates typical impedance values in ohms for
d&b loudspeakers. With correct measurement conditions and
relatively short cables, measured impedances should be within a
range of ±20 % of the values indicated in the table.
The values refer to a single cabinet. When two cabinets are
connected in parallel, the total impedance is halved, with three
cabinets it will be a third and so on.
Note: Please note that the LF values were determined by the
amplifiers' measurement algorithms using sine wave signals. A
DC resistance measurement using a multimeter may produce
different results.
D80 amplifiers apply audible low level signals in the Low
frequency range for a few seconds using dedicated
frequencies for each cabinet type. This reduces the impact of
ambient temperature and mechanical aging of the driver
components on the impedance values.
System
Z LF
Z HF
Z MF/LF rear
16C
7.5
12
-
24C
12
11
-
24C/CE
7
11
-
10AL/10AL-D
17
13
-
10S/S-D/A/A-D
17
13
-
12S/S-D
7
11
-
12S-SUB
8
-
-
18S/A-SUB
6.5
-
-
27S/A-SUB
5
-
-
4S
17
11
-
5S
16
11
-
8S
10
15
-
B1-SUB
4.5
-
-
B2-SUB
3.5
-
-
B4-SUB
5
-
-
B6-SUB
6.5
-
-
C3
8.5
4
-
C4-TOP
11
12
-
C4-SUB
6.5
-
-
C6/690
9
15
-
C7-TOP
7
8
-
C7-SUB
6
-
-
Ci-SUB
-tbc-
-
-
Ci45/60/90
7.5
13
-
Ci80
11
16
-
15. Appendix
d&b D80 Manual 1.9 en
76