The Yamaha HS50M speaker is a 70-watt, biamped reference monitor with a 5" neopropylene woofer and 3/4" tweeter. Designed to deliver an honest mix, the HS50M monitor speaker has a flat 55Hz-20kHz frequency response. Room control and frequency response switches allow custom tailoring of the monitor's response, making it perfect for all types of recording and multimedia applications. Easily create a 5.1 surround sound setup with the addition of an HS10W powered subwoofer (sold separately). The Yamaha speaker enclosure is constructed of high-quality MDF material and feature a multi-layer finish that minimizes resonance.