A:Answer Well, it depends if you want the wireless convenience of a Sonos speaker, ignoring the fact that they are active and plug in.
An active speaker is theoretically a well engineered match of a driver, one or more, and an amp, which I would argue a typical Sonos speaker is.
Your speakers may or may not pair well with the AMP but if it easy to run wires from one to the other it might be worth a try,
I would probably go with additional Sonos speakers for the sheer convenience and ease of installation given all the mounting options that a Sonos unit has that might not be available for your speakers.
One other thought...
You can control the Sonos speaker on the top/side of the speaker should you receive a phone call and want to mute it/them. You can't do that with passive speakers and an AMP.
