How much current are you switching for the little speakers?
Perhaps Sold State Relays would suffice, such as PVT212, can handle 800mA at high AC levels.
https://www.mouser.com/ProductDetail/Infineon-IR/PVT212PBF?qs=9%252BKlkBgLFf08WIN5p81c8w%3D%3D
I offer 8 of them on a board, turned on by shift register controlled by an Arduino.
Youtube:
http://www.crossroadsfencing.com/BobuinoRev17/