I have several "systems" and speakers in many rooms of the house.
Media Room: Klipsch Fortes, Klipsch Center (??), Klipsch Side/rear(???), Klipsch back(???), Denon AVR (???), Definitive Sub (???), Sony VPL??? Front projection on a 96" screen
Living Room: Klipsch Forte, Yamaha Reciever (???)
Sun Room: Klipsch towers (???) AudioSource AMP (Located elsewhere), Denon AVR (???) JVC 55" LED TV, Klipsch Kg-2's, Klipsch Center (???), Elac B5 Rear. Klipsch SW-10 sub, Boston Acoustics Sub (???)
Master BDRM: Denon AVR-5600, Denon Sub (???), Mission (???) Bi-Amped. Home made rear.
Office, Denon AVR-683, 5 denon speakers, Klipsch KSW-150 sub, 2 KG .5's attached to Adcom Amp elsewhere
Kitchen, two JBL (???) attached to Adcom Amp elsewhere.
All Amps have their own Chromecast Audio device to remotely play audio from a tablet independent of one another or integrated with one another.