The Spirit 4 is a very flexible and versatile bookshelf speaker, which can be either used as an excellent stereo setup, with pinpoint imaging and wide soundstage, or integrated into a thrilling surround system. As the Spirit 4 uses the same tweeter and mid/bass driver as the Spirit 11, sonically, it is a perfect match and able to perform with precision and accuracy. Despite the compact size of its cabinet, the deep bass qualities are astonishing. The implementation in a stereo system is recommended in rooms where powerful and dynamic sound is desired, but where there is not enough space for larger speakers.