Do you know a simple sound booster app for Mac? Some videos on websites have the sound volume so low that even with all sound settings at maximum levels it's hard to listen.

I'm looking for an app that would allow me to boost the Mac's volume. Something similar to VLC volume controls.

I already looked at Audio Hijack, but it has way too much features for what I'm looking for.
Anything free of charge would be a plus. :)
You can boost the volume of videos playing in Chrome using free extensions. I found the Ears chrome plugin works quite well. Steps:


install the plugin
click the Ears extension icon in chrome
drag the baseline from 0 up to +5
click EQ this tab