Well, be careful with the word shielding. In a car, UTP (unshielded twisted pair) wire is superior to shielded wire. At home, shielded wire is superior to UTP because of the types of noises in each environment. Hell, half the time, the big thick bulky wires are inferior to the cheapies in noise rejection.

"If you are flammable and have legs, you are never blocking a fire exit" -Mitch Hedberg