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.
65% have it
10. can be controlled remotely
A remote control allows you to control the device remotely. The remote control can be included or optional.
39% have it
11. drivers count
A speaker driver is an individual transducer that converts electrical energy to sound waves. More drivers may result in better sound quality.
This device works without batteries. It weighs less and you don't have to worry about recharging or replacing the battery.
26% have it
23. has USB mass storage support
It can transfer files, music, photos via USB, no need to install additional software.
14% have it
24. has AirPlay
AirPlay allows wireless connection of Apple devices with external screens or speakers. You may stream computer screen, video and music from iOS devices, play games like on consoles or present your slideshows easily on your TV.
14% have it
25. power consumption operation
How much power the device consumes when it's switched on.