Hello, externals speakers don't work with my Aspire one. The headphones work just fine, but spekers don', regardless of whether they have an external power source or not. Is there a setting I don't know about? The manual sounds like they should just plug & play.
More aboutacer aspire external speakers
What kind of external speakers? USB speakers? If so, then yes, just plug & play... have you tried on different laptop or PC?