Polk Audio TC620i Round 2-Way In-Ceiling Speaker (Single, White) Single round 2-way in-ceiling loudspeaker for custom installed sound systems Equipped with one 6.5-inch dynamic balance mineral/polymer composite driver with rubber surrounds Frequency response: 35Hz-25kHz Equipped with an aimable 0.75-inch silk dome tweeter with neodymium magnet Durable, moisture-resistant materials for safe use in kitchen, bath and sauna