The ST – AIR is the newest kid on the block. This system has all the fetchers of the STA 401, but here we have added a professional 12 channel mixing system and removed the AMP. Most of the Dance instructors today have changed to active speakers this is why there is no need to add the weight of an AMP that you will not be using.
The system is controlled directly from your computer, meaning that the system is just a box to plug your microphone and computer into. You do not even need the system on the table any more.
You can see the product videos in YouTube.