Alexa is the heart of an Ultimate Voice-Controlled Jukebox. Through it's wired output, Alexa provides awesome fidelity into an audio mixer that drives 3 JBL pro audio amplified speakers. Each left and right channel JBL-PRX825W speaker provides 1500 watts at peak and the JBL-PRX825w subwoofer can provide nearly 2000 watts intermittently. Alexa's audio extends below 25hz - enough to keep the subwoofer happy. The system is installed in a 25,000 cu ft room in a private home.
Inexpensive SONOFF Wifi activated switches to control power to create a fully voice-controlled system. The system requires three ac mains circuits to deliver adequate power to the 3 internally amplified speakers. This requires 3 wifi activated switches, one for each speaker. The Alexa "Smart Home Fan" skill drives eWelink commands singly to each speaker, or as a group. The power can also be controlled from a smartphone as well.
In the configuration, a user speaks "Alexa - turn on speakers". Then Alexa turns on all three powered speakers and then responds "OK" through the speakers to acknowledge the command. Using Amazon Music Unlimited (or Spotify, I-Heart, etc), Alexa can then play any one of thousands of Internet music selections on voice command. When the session is over, "Alexa - turn off speakers" shuts the system down. This enables true, hands-free music on demand.