Speaker wire resistance
This has come up before.
Assume at sometime someone will want to use 4 ohm speakers. The resistance of the speaker cables should not be more than 5% of the speaker impedance. So the speaker wire resistance should be no higher than 0.05 ohm. Now this is measured connecting the two wires together on one end and putting the resistance meter across the two wires end on the other end. So for a 55 ft run you will be measuring 110 ft of cable.
This has come up before and this is what I found out. This is from a previous post of mine on this topic.
Measure the resistance of those runs. You need to twist the ends of one end together, and put the ohm meter across the the open ends at the other end of the wire. Please let us know what the resistance is and you will be able to calculate your losses precisely.
I have dug out some 12, 24 and 16 Gauge wire, and it's better than I thought, it is about .002 ohm/ft, which would give you a total resistance of 0.5 ohm. 14 Gauge is about 0.003 ohm per foot, which would give a total resistance of 0.75 ohm. 16 Gauge is about 0.005 ohm/foot, giving you a total resistance of 1.25 ohms. So the 12 gauge run would be 8% of the impedance at 8 ohm, but 16% for 4 ohm speakers. The 14 gauge is 9.4% for 8 ohm speakers and 18.8% for 4 ohm. The 16 gauge is 15.6% for 8 ohm speakers and 31.2% for 4 ohm. I used stranded copper wire by the way.
Anyway measure your wire as results may vary.
That guy wanted to use speaker cables 125 ft long.
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