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
Meridian Explorer 2
With a detachable cable you can use alternative cables, and if the cable is pulled it will pop out instead of breaking.
Soundmatters FoxL DASH7
Meridian Explorer 2
The lowest frequency at which the device produces audio. The lower the low-frequency response, the stronger and juicier the bass.
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.
The highest frequency at which device produces audio. The higher the high-frequency response, the clearer and crispier the treble.
Bose SoundLink Air
Devices with a higher sound pressure level are generally louder when supplied with any given audio source.
OM Audio Mantra
More microphones result in better sound quality and enable the device to filter out background noise.
Amazon Echo Show
The lowest frequencies that the mic can pick up well. Better for recording bass. If a microphone is going to be used for speech, a voice microphone, it must have great gain for bass, since human voice is in the low frequencies.
The battery can be recharged and used over again.
An indicator shows you when the device has low battery.
Amazon Echo Plus 2
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.
A standard 3.5mm male connector is suitable for use with all MP3 players and computer sound cards.
Wireless devices allow users more freedom of movement.