1. A mobile personal audio device comprising: a case sized for placement along a user's neck; a power source maintained within the case; a first speaker maintained within the case at a first side thereof; a second speaker maintained within the case at an opposite, second side thereof; a microcontroller maintained within the case and programmed to perform one or more audio-related operations, the microcontroller being electronically connected to the speakers and the power source; and first and second stem assemblies extending from the first and second sides of the case, respectively, each of the stem assemblies including a tube having a first end adjacent and open to a corresponding one of the speakers and terminating at a second end, wherein each of the stem assemblies are configured such that the corresponding tube is positionable in a user-selected extended state in which the corresponding second end is displaced from the case and a collapsed state in which the corresponding second end is in close proximity to the case; wherein the device is configured such that in the extended state, the case is locatable at the back of the user's neck, the tubes extend along opposite sides of the user's head for selective placement of the second ends near a respective one of the user's ears, and the microcontroller operates to cause the speakers to generate audio sound waves that are delivered to at least one of the user's ears via the second end thereof.