Compact speaker

A playback device comprising:

• a housing defining an interior volume, the housing comprising a front face, a rear face, and a side wall extending between the front face and the rear face;
• a transducer disposed in the interior volume of the housing, the transducer comprising a first membrane and a second membrane in an opposed relation to each other and configured to move towards and away from each other, and a driver assembly configured to drive the first and second membranes to produce acoustic energy;
• at least one additional transducer disposed in the interior volume of the housing;
• a speaker vent in the front face configured to direct first acoustic energy from the first membrane to an exterior of the housing;
• and
• a plurality of acoustic ports in the side wall configured to direct second acoustic energy from the second membrane to the exterior of the housing.

A media playback system comprising:

• an external device;
• and
• a speaker assembly configured to magnetically couple to the external device, the speaker assembly comprising
• a housing having a front face, a rear face, and a side wall extending between the front face and the rear face, the housing including at least one magnet disposed within a first portion of the rear face to magnetically couple the rear face of the housing to the external device, the housing further including a first speaker vent in the front face and one or more acoustic ports in the side wall, and
• a transducer disposed within the housing, the transducer comprising a first membrane and a second membrane in an opposed relation to each other and configured to move towards and away from the front face, and a driver assembly configured to drive the first and second membranes to produce acoustic energy,
• a communication interface disposed within the housing,
• at least one processor disposed within the housing, and
• a non-transitory computer-readable medium disposed within the housing and storing program instructions executable by the at least one processor to cause the speaker assembly to
• obtain, via the communication interface, audio content from the external device, and
• play back, via the transducer, the audio content received from the external device.