The speakers are replaceable (and therefore upgradeable), but like a sibling comment noted, most of the magic in speakers in portable consumer electronics produ

The speakers are replaceable (and therefore upgradeable), but like a sibling comment noted, most of the magic in speakers in portable consumer electronics products comes down to DSPs and smart amps. We started with a CODEC that had built in smart amp and DSP functionality, but weren't able to get the necessary support from the supplier to enable it. It ended up not mattering anyway, because we had to switch to a different CODEC without that functionality due to the global silicon crunch. This is absolutely something we want to improve in the future. We're actively investigating other audio parts we can use that have better capability, but equally importantly, supply availability and software support.