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missing-root If you are referring to the headphone jacket; that is correct, Google did not install this even though there is plenty of room left to embed a 3.5" headphone port to the device, which reduces the mount of options we have to connect external peripherals.
A solution could be a USB-based speaker while the main speakerdock connects the tablet to the mains.
However, it is not the easiest solution, and not everone has access to an external USB speaker.