I have some old speakers in the house that I wanted to test. So instead of messing with the real stereo unit from the 80s, I bought a $30 stereo from Amazon, and new speaker wire.
The speakers sound okay, but there’s a hum coming from them all the time. Even with the stereo volume knob turned all the way down. Is this normal for stereo systems and I just haven’t noticed?


You can’t compare a $30 Amazon stereo to anything made before 1990. That would be equivalent to something costing $10-$15 back then, which wouldn’t have even existed.
There’s plenty of extremely high quality audio equipment that is made today, it just costs real money, just like it did back then.
Yes, for a lot of people, used gear would probably work fine, but it wouldn’t have the inputs they need (no HDMI, no Bluetooth, etc.) heck, a lot of folks would expect it to have WiFi to cast their Spotify music to it.
True. I dont care about any of that, just sound and analog inputs, so id never buy used unless it was actually a high quality or boutique build. Or better yet a kit!