No.
The conductor size is way too small. The loss of power to the speaker would be huge, and a decent-sized amp could easily overheat the wires. Bad idea.
Cat5 is the standard.
Cat5
Cat5
Cat5, Cat5e, Cat6, and Cat6e can be used, u can always use a better cable than required, but not the other way around
CAT5
Speaker cable is used to connect the speaker outputs on audio devices such as a receiver or amplifier to the inputs on the speaker(s).
if by "twisted pair cable" you mean a cat5 cable which is commonly used as an ethernet cable. then it´s made of copper.
Cat 5E or Cat5
twisted pair cable can used as LAN connections....for example CAT5 and CAT6 both twisted pairs.
Speaker cable can be used bare or with pin, banana, spade or ring terminals.
cat5,cat5e $ cat6
Today's standards use Cat5 cable. Cat6 is newest but more expensive and harder to install.