The material used for speakers has a big effect
Those black circles inside your speakers? Those are called cones, and their job isn’t to serve you rum raisin, it’s to play your music. Cones do this by vibrating rapidly based on the electronic signals they receive (from the music files you’re playing). They in turn push and vibrate the air, which is what your ears hear. While metal cones often support high frequencies, paper cones are much more versatile. Bose uses mostly paper cones because their main goal is to achieve super natural sound. Stay tuned for more on that later… get it? Tuned.
Cones and transducers have very specific purposes
Driving those cones are transducers, which are essentially electromagnets that take that aforementioned audio signal (bumpin’ tunes) and translate that to your earholes. Bass soundwaves naturally pour out of speakers in all directions, while higher sounds are much more focused (think of dumping a bucket of water vs. spraying a hose). Ergo, higher-frequency cones are placed facing where a listener is likely to be, while lower-frequency cone placement doesn’t matter as much. It's why people often tuck a sub woofer off to the side or into a corner of their living room sound system.