Help with current setup - in-wall speakers, no amp/receiver/controls (1 Viewer)

Hello, we recently moved into a house where 8 rooms including outside has in-wall Boston Acoustic speakers. Previous owners did not use the system, so we couldn't ask them. First owners ran monster cables and cat5 wires to the basement where I believe they had the big control system.

Additionally, they had controls in walls that worked off the cat5s (these are now just plated). All wiring is in place... how do you recommend we put the receiver/amp/etc? We had a Sonos guy come out to do an estimate, but it seems since everything is wired already isn't necessary... Would love to access each zone from an app or in wall switch?

Lastly, we have two surround systems and receivers that we brought from previous house. Those have already been hooked up to each of the TVs/receivers.

So the in-wall speakers would probably just used to play music.

Many thanks for your help!

By "Monster Cable"...Speaker wire?RCA?There are bunches of options out there that use cat based LCD screens to a central amp.Kills me when people remove this stuff when they sell a house.

Monster cables are the speaker wire, it has 4 smaller wires inside instead of 2 usual speaker wires that I am used to.

That just means it is 16/4(maybe 14).CL rated wire is often 4 strand so you only run the wire once. Not twice.