17.1. System check - References
17.1.1. 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.
10D/30D 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/side
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 - -
24S 3 16 -
24S-D 3 16 -
18S/A-SUB 6.5 - -
21S-SUB 4.5 - -
27S/A-SUB 5 - -
4S 17 11 -
5S 16 11 -
8S 10 15 -
B1-SUB 4.5 - -
B2-SUB 3.5 - -
B22-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 -
17. Appendix
d&b 10D/30D Manual 1.10 en 85
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