Polk Audio Atrium 45p 50-Watt Powered Indoor Speakers (Pair, White) Pair of powered indoor speakers with 4.5-inch long-throw polymer cone drivers with butyl rubber suspensions 0.75-inch soft dome tweeters with neodymium magnets Built-in 25-watt amplifiers for direct audio source connection Gold-plated 5-way binding post speaker-level and RCA coaxial line-level inputs Frequency response: 60 Hz to 20 kHz (+/- 3 dB)