It would seem all there is out there is CCA wire. If you want copper wire its 3 to 4 times the cost for OFC vs CCA.
Not true. CCA has been through
periods of popularity, several times, but it's far from all there is.
in the example above a vehicle loses 2 amps and 100 watts just using a few feet of CCA wire vs OFC.
It's an extreme test, 40 amps in the circuit. And the reduction in output power between 509W and 408W is one whole dB. The actual power loss in the wire is 77 watts, not 100. And clearly the wire is undersized.
To get 500W into a 6 ohm speaker load you run about 9A at 55Volts. That's very different.
This may well be the weakest link in most peoples home audio systems if they are using aluminum wire with less conductivity.
There is some CCA in home wiring, but I've never seen CCA speaker wire. Ever.
I did not want to start a new thread so sorry for resurrecting this one.
So the question is............. how many have copper all the way to the electrical outlet, and aluminum after the amplifier LOL.
I have 100% copper in the electrical circuits and speaker wires. It wasn't even a question during the addition build 12 years ago.
the utube video here shows 100 percent power transfer with copper (no amperage loss)
No it does not. There is loss in copper too, just look at the numbers. There's a .62V drop across the copper, and a loss of about 30 watts. That's not 100%.
Strikes me both wires are undersized for the application. This demo is for a automotive powered amp. The wire load is nothing like a residential speaker load, and nothing like residential wiring loads either (20A and 120V). The demo relates only to that specific set of conditions, it's not translatable to other conditions without proper scaling.
Note that the battery also has internal resistance, as can be seen by the battery voltage readings. Not that it means much, but it's also a factor in that test.