Studiophile LX4s are the world's first reference monitors that allow you to expand from 2.1 to 5.1

Studiophile LX4s are the world's first reference monitors that allow you to expand from 2.1 to 5.1 seamlessly on demand. The LX4 2.1 System gives you two transparent satellite speakers and a powerful subwoofer with integral crossover for a sound that surpasses mere stereo. When you're ready to mix and experience multi-channel audio, just add another three perfectly matched satellites with the LX4 5.1 Expander (sold separately) for a complete professional-sounding 5.1 surround system. The LX4s' performance also makes them great all-around real-world reference monitors in both 2.1 and 5.1 configurations.