The built-in speakers in Apple’s laptops and all-in-one Macs have never been bad but, as the company moves towards thinner and thinner designs, the sound quality has never been great either. There’s only so much that audio processing can do to enhance small, shallow speaker drivers. While Mac owners have always had the option of using a set of external speakers or quality headphones, neither are a perfect solution. External speakers can be bulky and require several additional cables -…