This is a two-way, inherently full-range design. The midrange/tweeter is a 26″ ribbon which handles the range above 600Hz. A dipolar, electrodynamic driver takes over below that frequency. It’s a large film panel with embedded conductors, located near a large array of permanent magnets on one side. The operating principle is electromagnetic rather than electrostatic—no external polarizing voltage is required. The current in the conductors reacts to the fixed, permanent magnetic field, causing the panel to move.

The Stage can be bi-amped via two sets of terminals on the rear. A two-position switch selects between two level settings for the midrange/tweeter—Normal and High—altering the overall balance.

See review here:

http://www.stereophile.com/floorloudspeakers/789/#lVoYOkqfFLD0SgX3.97