I upgraded to the 4a on Fi with the pre-order. The interesting part is that the tear-down doesn't go into the audio design, or perhaps I missed it. The pixel 4a is by far the loudest phone I've owned from the G1 on - I run calls with the volume turned most of the way down, most of the time, whether on speaker or not. I can't quite figure out how they generated that much volume from such a small enclosure, but it's a revelation for someone with hearing damage and mirrors the near-perfect execution of the rest of the hardware/software stack, like bluetooth, wifi, and the display. I can read smaller text on a smaller screen than I could with my previous pixels. The design team really deserves all the kudos they receive. I'm happy Google took the extra time to nail it.