Polk Audio R30 - Single 2-way, floorstanding speaker with base and carpet spikes- One 6.5-inch woofer and a .75-inch dome tweeter- Uses Polk's Dynamic Balance drivers for flat frequency response, sharp detail, dynamic prowess, and sonic transparency- 55 to 20,000 Hz frequency response (-3 dB), high 89 dB efficiency- Measures 7.8 x 33.8 x 9 inches (W x H x D)