The Proficient C620 is an in-ceiling speaker that is designed to provide outstanding sound effects in your living room. With the frequency response range of 45-20000 Hz, this Proficient speaker enables you to listen to a range of sounds. Thanks to its two 6.5-inch polypropylene woofers and a 1.0-inch pivoting silk dome tweeter, this in-ceiling speaker offers you experience ultra-high-frequency as well as lower midrange notes amazingly. Moreover, with a sensitivity rating of 91 dB, the Proficient C620 speaker effectively converts 100 watt power to produce clear sound. All in all, with its ability to produce sweet and detailed sound, this Proficient speaker is perfect for true music lovers.