I emailed Speck about the covered speaker port. Apparently Samsung approved this partially covered design!
"Thanks for reaching out to us! We are well aware that the design of the case covers the speaker port. This design was intentional to add extra protection to the device and make the case more robust and durable. In order to not lose any sound quality with this design, we’ve added a cutout inside the case which is our speaker re-direct feature. Essentially, it’s a cavity cutout inside the case, that redirects the sound from the speaker that is being covered, to outside of the case, towards the user.
Please know that we are a member of the Samsung’s SMAPP program. Samsung inspects and fit tests all of our cases to ensure that our cases work perfectly with the device and no features of the device our hindered by our cases. As Samsung does with all of our cases, Samsung approved this case and recognizes that our case doesn’t impede the sound coming out of the speaker."