Acer computer sound is tinny and echoes

Speaker issue desktop's only
1. Plug USB into USB port (any)
2. Plug Black speak cable into LIGH GREEN (NOT BLACK) connector
3. You will see a popup window - make sure it is on Front Speaker out
4. Click OK - you will a cartoon computer with speakers on either side -then click on one of the
speakers to test
5. if that does not work then follow this:
Reinstalling apps:
1. If in Windows - Start - Programs - Acer Empowering Technology - Acer E-recovery management -
click on Restore at bottom then "Reinstall apps and drivers" - look for hardware drivers that you
need. Click "install now"

It sure sounds like to me that your sound properties got messed up some how, Go into your control panel and look up your sound card or sounds. Now once in you settings, You can set them the way you want to hear it, Or you can use the default setting, That would set it back to original factory settings and back to normal, It just sounds like someone changed the settings by accident, That should get your speakers back to normal, You will also notice that there a many settings in your audio properties that can change the way the system sounds thru the speakers. If that don't help the problem let me know we will get it right if you can 't get it.... thanks bear001