The speakers themselves are actually really good, however Framework doesn’t do any DSP tuning at all, instead keeping the default flat DSP profile, which isn’t suitable for this laptop.
You can see here how to drastically improve the sound on this laptop. I was surprised myself at how significantly the sound improved from such a simple fix. Right now, it requires running software on your laptop, such as EasyEffects, to do the sound processing. However, if Framework did some testing and gave us a more optimal tune to flash at the firmware level, that would be optimal. Alternatively, they could provide more detailed information on the audio codec chip, so the community can go about doing this work themselves.
See here how to improve the sound on your laptop now, with a software solution: