If you decide to keep it there is a massive thread that has run for many years about improving the sound of the FW13 speakers. By far the most popular approach is to use software to apply an equalisation curve to the audio that’s routed to the speakers. The software that achieves this is O/S dependent.
Several EQ curves became candidates for the “sweet spot” and I’ve been using one of those for a couple years. While it’s not a panacea, the result is good enough for most conversation-level use cases. For anything else I use a BT speaker or headphones.
It seems possible that a similar approach might be applied to a FW12. Other than making this suggestion I’m months away from being able to tinker with an FW12 myself.
For reference, here a link to the thread I mentioned.