Active Speaker + Alexa voice control + Bathroom

[atomar]

You can put a echo in the next room and scream as hard as you can “alexa” (:

Otherwise I don’t see how you would voice control without a microphone enabled Alexa device…

Yeah, I need to rephrase my question. So basically I though I could use an active speaker with microphone which is connected to Alexa to use Alexa voice control. Till now I could not find any in wall ceiling speakers with this functionality, unfortunately.  

So now my new plan. Using Echo Dot (3. Generation) as voice control an hide it somewhere in mirror cabinet. As speaker I will use Q Acoustics Q Install Qi65S ST In-Ceiling Stereo Speaker (Single) and active Bluetooth amplifier and connect it to Alexa. 
So the remaining question I have is, how can I use Alexa voice control to control light and roller shutter. I also would like to install a motion detector (depending on the time)  and KNX button which should turn the music on / off . 

I ordered LSS100200 SCHNEIDER ELECTRIC but I will be able to use in some months because the house where I will use it is in construction phase.

Best regards