DESC: The Model 2200 SR Dipole/Bipole Surround Speakers are intended for use in multi-channel audio/video sound systems as dedicated side or back surround channel speakers. Each 2200 SR enclosure features the identical tweeter and midrange components found in the 2200 front LR speakers. The surround speakers can be switched between Dipole and Bipole operation for maximum flexibility when used with high resolution audio sources such as SACD or DVD-A, or for conventional surround effects to mimic the surround array found in commercial movie theaters.