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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
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)
4 Ohm Speakers
21%
50%
1 dB
3 dB
571'
1930'
174m
588m
359'
1214'
109m
370m
226'
764'
69m
233m
142'
480'
43m
146m
89'
302'
27m
92m
55'
185'
17m
56m
35'
117'
11m
36m
22'
74'
7m
23m
13'
46'
4m
14m
9'
29'
3m
9m
Landscape/Hardscape Subwoofer Product 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:
8 Ohm Speakers
11%
21%
50%
0.5 dB
1 dB
3 dB
554'
1141'
3859'
169m
348m
1.2km
349'
718'
2428'
106m
219m
740m
219'
452'
1528'
67m
138m
466m
138'
284'
959'
42m
87m
292m
87'
179'
604'
27m
55m
184m
53'
110'
371'
16m
38m
113m
34'
69'
234'
10m
21m
71m
21'
44'
147'
6m
13m
45m
13'
27'
91'
4m
8m
28m
8'
17'
57'
2m
5m
17m
70V Speakers
11%
21%
50%
0.5 dB
1 dB
3 dB
2.6mi
5.3mi
18mi
4.14km
8.5km
29km
1.6 mi
3.4 mi
11.3 mi
2.6km
5.5km
18.1km
1mile
2mi
7mi
1.6km
3.4km
11.4km
3376'
1.3 mi
4.5mi
1km
2.1km
7.2km
2127'
4380'
2.8mi
648m
1.3km
4.5km
1305'
2687'
1.7mi
398m
819m
2.8km
823'
1694'
1mi
251m
516m
1.75km
518'
1068'
3610'
158m
331m
1.1km
321'
661'
2234'
98m
201m
681m
202'
417'
1409'
62m
127m
429m
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