The Yamaha NS-777 Tower Speaker has dual 8" polymer-injected mica diaphragm (PMD) woofers, a 5" cone midrange driver with a waveguide horn, and a 1" aluminum dome tweeter with a waveguide horn. The system features a Highly Oriented Polyolefine design for improved transient response, higher power handling, and flatter frequency response. The speaker is magnetically shielded to allow placement near a TV without distorting the image.