Appendix; System Check - References - D&B D80 Manual

15. Appendix

System
16C
24C
24C/CE
10AL/10AL-D
10S/S-D/A/A-D
12S/S-D
12S-SUB
18S/A-SUB
27S/A-SUB
4S
5S
8S
B1-SUB
B2-SUB
B4-SUB
B6-SUB
C3
C4-TOP
C4-SUB
C6/690
C7-TOP
C7-SUB
Ci-SUB
Ci45/60/90
Ci80
d&b D80 Manual 1.8 en

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 in 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 region range using dedicated frequencies for each
cabinet type for a few seconds, reducing the impact of
ambient temperature and mechanical aging of the driver
components on the impedance values.
Z LF
D80
7.5
12
7
17
17
7
8
6.5
5
17
16
10
4.5
3.5
5
6.5
8.5
11
6.5
7.5
7
6
-tbc-
7.5
11
Z HF
12
11
11
13
13
11
-
-
-
11
11
15
-
-
-
-
4
12
-
15
8
-
-
13
16
Z MF/LF rear
D80
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
73