Legacy-audio Silhouette User Manual download pdf (Page 10)

The ideal conductor would have negligible resistance, inductance

and capacitance. The table below shows how a few actual speaker

cables measure up.

Cable Ωs/ft pF/ft µH/ft

12 ga. 0.0033 24 0.21

14 ga. 0.0048 17 0.13

16 ga. 0.0079 16 0.18

18 ga. 0.0128 28 0.21

Capacitance is considered insignificant in each cable because its ef-

fect is well out of the audio bandwidth; inductance can be de-

creased (at the expense of increased capacitance) by keeping the

conductor pair closely spaced.

How long would a cable have to be before inductance effects would

impinge on the audio spectrum? Approximately 300 feet of 12 gauge

would be required to establish a corner frequency of 20 kHz with an

8 Ohm loudspeaker. As you see, inductance is not a problem for

most of us.

Hooking Up Cables

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Legacy-audio Silhouette User Manual Page 10