I hooked up my trusty old Logitech speakers to see if they still worked. They did, so I booted a game and sheepishly turned the volume way down in fear of annoying my neighbors, immediately remembering why I had these stuffed in a closet for almost 10 years.
Even if I lived in a soundproof house in the middle of nowhere I'd still be self-conscious enough to just use headphones instead 
I have an am transmitter I keep in my room that I use to broadcast to restored antique AM radios. They were incredibly loud and I had to get one of those as well until I got a different transmitter that allowed me to modulate the output power.