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WIRING INFO - 70V/100V OPERATION
Speaker cable
Wiring speakers for 70V/100V systems is simple and easy. A single run of
2-conductor, stranded wire is run to every speaker location leaving a small
loop (2-3 feet is usually more than sufficient depending on the speakers and
their mounting type) at each speaker location. You can place additional loops
for future expansion or for making speaker location changes if needed.
Note: This is very different from typical low-impedance wiring used for
Speaker Cable Length for Various Gauges at Low and High Impedance
4 Ohm Speakers
AWG
11%
0.5 dB
277'
6
84m
174'
8
53m
110'
10
33.5m
69'
12
21m
43'
14
13m
27'
16
8m
17'
18
5m
11'
20
3m
7'
22
2m
4'
24
1m
6
Power Loss in Cable (% Loss & dB Loss)
8 Ohm Speakers
21%
50%
11%
1 dB
3 dB
0.5 dB
571'
1930'
554'
174m
588m
169m
359'
1214'
349'
109m
370m
106m
226'
764'
219'
69m
233m
67m
142'
480'
138'
43m
146m
42m
89'
302'
87'
27m
92m
27m
55'
185'
53'
17m
56m
16m
35'
117'
34'
11m
36m
10m
22'
74'
21'
7m
23m
6m
13'
46'
13'
4m
14m
4m
9'
29'
8'
3m
9m
2m
AW10-LSUB-BR Installation Manual
residential audio installations where a dedicated run of wire goes from each
speaker back to the amplifier/receiver. 70V/100V wiring uses much less wire
and the wire used can be a much higher gauge (thinner wire) even though it is
used in a longer run.
Here is a chart showing some of the differences possible among wire lengths
for both low impedance (4Ω-8Ω) and high impedance (70V/100V) systems:
70V Speakers
21%
50%
11%
1 dB
3 dB
0.5 dB
1141'
3859'
2.6mi
348m
1.2km
4.14km
718'
2428'
1.6 mi
219m
740m
2.6km
452'
1528'
1mile
138m
466m
1.6km
284'
959'
3376'
87m
292m
1km
179'
604'
2127'
55m
184m
648m
110'
371'
1305'
38m
113m
398m
69'
234'
823'
21m
71m
251m
44'
147'
518'
13m
45m
158m
27'
91'
321'
8m
28m
98m
17'
57'
202'
5m
17m
62m
21%
50%
1 dB
3 dB
5.3mi
18mi
8.5km
29km
3.4 mi
11.3 mi
5.5km
18.1km
2mi
7mi
3.4km
11.4km
1.3 mi
4.5mi
2.1km
7.2km
4380'
2.8mi
1.3km
4.5km
2687'
1.7mi
819m
2.8km
1694'
1mi
516m
1.75km
1068'
3610'
331m
1.1km
661'
2234'
201m
681m
417'
1409'
127m
429m
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