How can I limit the volume on integrated amp

It's a beach condo. It's made for weekly rentals. I plan to spend a few weeks a year there and it'd be nice to have a decent system to use while I'm there.

After reading the responses I'm thinking a cheap bluetooth sound bar is the way to go.

Millercarbon, thank you for the input. I'll give it a shot. Any direction on where to find the resistors?