We bought a house that has speakers in the living the room and two speakers outside (with the speaker wire already run through the wall and to the outside of the house).

We want to add more speakers outside, ideally without having to drill through the house to run wires.

Right now all the speakers are connected to a Pyle PT7968T in the living room.

My thought was to add an amplifier outside. I started researching options and came across a variety of possibilities (like an audio signal splitter with signal line driver) but realized I was in over my head....and hence why I'm here.

Any thoughts/suggestions/help would be greatly appreciated!

Edit:. I should have mentioned I already have some outdoor waterproof speakers.