This is a set of two Yamaha 2-way bass reflex bookshelf stereo speakers that are perfect for any room. They feature Waveguide Horn to reduce reflected sound, internally wiring with Monster Cable, magnetic shield, 5” polymer-injected woofers and 1” aluminum dome tweeter. Frequency response: 65Hz-35kHz. Measures 7.88” x 12.63” x 8.38”.