You can buy a new pair of EAW designed Mackie SRM450 1000 watt (powered) PA speakers that could blow the doors off your garage for about a grand a pair. I've used these in various forms for pro sound work for decades, and they're virtually bulletproof, very well designed, and sound amazing. Used pairs of these things are cheap, and no "home audio" speakers I know of can play as loud and clean as these things. I use an "unpowered" pair of the smaller 10" woofer version in my studio with a sub, and for live stuff also. They're even cheaper.
Best garage speakers
I need two good garage speakers to fill 900 sq ' and to sit against a 30 foot wall. Eyeroll, I know, this is a sophisticated forum but help an old guy . We 4 guys have a few whatevers and listen to good tunes after fishing in northern Mn . I have a Yamaha RX-V992 receiver. Bookshelf or floor speakers are fine. I have room for a sub too..I'll spend up to $400-$500 for a used set on Marketplace or this site. What would you look for to buy