Altec Lansing Octiv Duo
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.
A speaker driver is an individual transducer that converts electrical energy to sound waves. More drivers may result in better sound quality.
Vifa Stockholm 2.0
The driver unit is the component that produces sound in the device. Bigger drivers are more powerful and can produce better bass.
Meridian Explorer 2
Devices with neodymium magnets are lighter and more powerful than those which use ferrite magnets. They also have more bass and clear high notes.
Soundmatters FoxL DASH7
Devices with stereo speakers deliver sound from independent channels on both left and right sides, creating a richer sound and a better experience.
An amplifier is integrated into the device. An audio amplifier takes a small signal and makes it bigger without making any other changes in it which results in better sound, so any sound source can be connected to speakers.
More microphones result in better sound quality and enable the device to filter out background noise.
Amazon Echo Show
A magnetic shielding limits the coupling of a magnetic field between two devices. The purpose is to prevent magnetic fields from interfering with electrical devices and avoid distortion (of TV, monitors, hard drives etc.).
An auxiliary input allows you to play other audio sources by connecting them through a simple audio connection like a 3.5mm jack, i.e for MP3 or portable DVD/CD player.
With more USB ports, you are able to connect more devices.
The Apple dock connector is a proprietary 30-pin connector that is common to Apple devices (iPods, iPhones and iPads) predating the Lightning connector. Allows you to connect older Apple devices, play music and at the same time charge it.