I don't think replacing speakers is going to make a difference. I've never heard a laptop that had good sound quality, ever. Some are less repulsive than others but none are good. If you want good quality sound its going to take either good headphones/earbuds, good BT speaker system or an external speaker system that can be plugged into the digital output. Personally when Im using it for something where sound quality is a concern I use a Bose Soundlink III BT speaker, easy to set up, no wires and portable.
