This 2-way speaker features a built-in step-down transformer, allowing it to be used as part of a 70V or 100V constant voltage speaker array with four (100V) or five (70V) taps. It can also be configured as a conventional 8-ohm speaker for use in a standard home theater audio system. The speaker has a preinstalled back can, which helps deliver superior audio quality. - 8 ohms nominal impedance - Compatible with 70V and 100V constant voltage speaker systems - Built-in step-down transformer with 4 (100V) or 5 (70V) taps - Preinstalled back can for superior audio quality