A multi-speaker audio system is configured to provide flexible use of speakers in any number of different environments. The multi-speaker system may include a stationary speaker unit and a portable speaker unit. The portable speaker unit may be operated in conjunction with, or separate from, the stationary speaker unit. When connected or otherwise used with the stationary speaker unit, the portable speaker unit may receive audio signals and pass at least some of the signals and/or corresponding data to the stationary speaker unit for output. When disconnected from the stationary speaker unit, the portable speaker unit may receive audio signals and output sound accordingly. The stationary speaker unit may also be able to receive audio signals and pass at least some of the signals or corresponding audio data to the portable speaker unit or output the data itself. The speaker units may be physically coupled to each other, such as by connecting the speaker units using an adapter or port, joining electrical leads, or nesting the portable speaker unit at least partially within the stationary speaker unit.