Db D80 Manuel d'utilisateur télécharger pdf (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

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Db D80 Manuel d'utilisateur Page 76

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