surpassing the ordinary;
Why is the jacket the way it is?
Color coding for each of the types of wire to identify what you're using (time is money).
16/2 has a green line
16/4 has a red line
14/2 has a yellow line
14/4 has a blue line
Every foot has a total foot marker
For installers, knowing what to charge EXACTLY
For installers and end users, knowing how long your run is in case it's over the limit for distance (see table and for why)
Jacket construction for "slickness"
The jacket is round and has a coating on it to allow it to slide through installation holes quicker and stay more in tact.
High Strand Count of individual copper
Flexibility because you want to have a complete wire length in tact in the end. If you use a wire with too few of wire strands (cheap cable), you risk breaking those in pinch points. You're not going to find this out until AFTER your drywall is up, painted and finished. Not too high of a strand count. More is not necessarily better in terms of strand count. If we could get away with fewer strands for quality, we would.
105 strands for 14 gauge
65 strands for 16 gauge
The box is designed for easy payout the whole way through. Spools will be "coiled" in such a way that pay out often kinks with that perfect coil twist. While that's good for garden hoses, it's a pain in the rear for installing wire.
Near 100% pure copper wire strands
Higher conductivity means lower heat over distance
Better bass at the limits of the wire lengths
Cost effectiveness over using the next larger wire gauge