I just got my batch 16 FW16 and I’m fairly pleased with it overall. Something I noticed about the speakers is that if I remove the input module filler pieces from either side of the touchpad module, the treble output from the speakers improves noticeably.
I think there is an after-sales improvement opportunity here: The filler pieces dampen treble from the speakers and if there were little holes drilled in the filler pieces near the edges, I think it would improve the experience.
I also think microdrilling holes in the midplate above the speakers, in conjunction with microdrilled holes in the filler pieces, would make for a much fuller range aural experience.
I was worried the speakers weren’t going to be very good, but I’d rank them above the speakers in my Surface Book 3, and nearly on par with the speakers in a Surface Pro 7+. I think the FW16 speakers may have a bit more low end than the Surface Pro 7+, but the overall hi/lo balance is better on the Surface.