Top critical review
It's Not Copper Wire. It's CCA.
Reviewed in the United States on March 26, 2021
This wire isn't copper.
it's Copper Clad Aluminum wire (CCA). CCA wire has more resistance than copper wire. You can use it just fine, but be aware that the distance you run with CCA wire will be less than you can run with copper wire of the same gauge.
Do your research before running a longer run (20+feet).
For 10- 20 foot applications @ 8ohms, you're fine.
The rule of thumb is that using pure cooper wire, 16 gauge wire with 8ohms (speakers) should not exceed 48 feet. Many home speakers use 6 ohms. At 6 ohms, the max length is 36'.
CCA wire is about one size worse for resistance than copper wire, so a 16 AWG CCA wire should not exceed 32' at 8ohms and 24' at 6 ohms.
Sound quality is the same between CCA and Copper.
Length is one way and per speaker (run).