A speaker driver is an individual transducer that converts electrical energy to sound waves. More drivers may result in better sound quality.
2.control panel placed on a device
There is a control panel on the device body, so you can easily access the volume control or remote without having to interact with a cable or another device it's connected to.
With a detachable cable you can use alternative cables, and if the cable is pulled it will pop out instead of breaking.
We consider a lower weight better because lighter devices are more comfortable to carry. A lower weight is also an advantage for home appliances, as it makes transportation easier, and for many other types of products.
The width represents the horizontal dimension of the product. We consider a smaller width better because it assures easy maneuverability.
The height represents the vertical dimension of the product. We consider a smaller height better because it assures easy maneuverability.