Master Audio
KEY Series (Passive). Version 1.0
Jan14
13
5. POWER LOSSES (%) AND DAMPING FACTOR, RELATED TO WIRE LENGTH
AND SECTION
(*) Referred to an amplifier with a Damping Factor of 200:1.
Wire sections under
2.50 mm
2
are completely inadvisable.
For fixed installations with a 4-Ohm load, it is better to have one wire for each
speaker system. It is not advisable to bridge one cabinet to another.
Wire length
(m)
Section
(mm
2
)
Resistance
(Ohms)
Power losses
8Ohms 4Ohms 2Ohms
Damping losses(*)
8 Ohms 4 Ohms
0.75 0.042
0.53%
1.05%
2.10%
98 49
1.50 0.025
0.31%
0.63%
1.25%
123 62
2.50 0.013
0.16%
0.33%
0.65%
151 75
1
4.00 0.008
0.10%
0.20%
0.40%
167 83
0.75 0.210
2.63%
5.25%
10.5%
32 16
1.50 0.125
1.56%
3.13%
6.25%
48 24
2.50 0.065
0.81%
1.63%
3.25%
76 38
5
4.00 0.040
0.50%
1.00%
2.00%
100 50
0.75 0.420
5.25%
10.50%
21.00%
17
9
1.75 0.250
3.13%
6.25%
12.50%
28 14
2.50 0.130
1.63%
3.25%
6.50%
47 24
10
4.00 0.080
1.00%
2.00%
4.00%
67 33
0.75 0.840
10.50%
21.00%
42.00%
9
5
1.50 0.500
6.25%
12.50%
25.00%
15
7
2.50 0.260
3.25%
6.50%
13.00%
27 13
20
4.00 0.160
2.00%
4.00%
8.00%
40 20
0.75 2.100
26.25%
52.50%
--- 4
2
1.50 1.250
15.63%
31.25%
62.50%
6
3
2.50 0.650
8.13%
16.25%
32.50%
12
6
50
4.00 0.400
5.00%
10.00%
20.00%
18
9
