Not true. The EeePC 701 netbook is a really minimal underpowered machine, still it will run small Linux distros just fine (it was actually sold with Linux in the first place). If you want a music player that you can control from another room, you can do that by installing a very small distro such as the x86 Alpine Linux image (https://alpinelinux.org/downloads/) then the mpd daemon (https://www.musicpd.org/ - it's in standard repositories install it with "apk add mpd" from root shell) which can work headless, therefore requiring very few resources, then a suitable control app for your phone or tablet (search for mpd control app), so that you can do pretty much everything through your home WiFi from any room, basement, backyard, etc.
Should you experience noises, cracks, hum and static when connecting the netbook to an amplifier and to a mains adapter, that is a common problem of ground loops and not of that particular netbook, that will be easily solved by adding a small audio transformer in between.