Product:Martin Logan Renaissance ESL 15A + Isoacoustic GAIA I Characteristics: ​Electrostatic speaker with active bass Build quality: Fantastic Color: Black Gloss Suited for: The Renaissance ESL 15A features a 15-inch Curvilinear Line Source (CLS™) electrostatic panel paired with dual 12-inch aluminum cone woofers. These woofers are powered by two 500-watt Class-D amplifiers. This combination delivers a frequency response from 22Hz to 21 000Hz, ensuring detailed and immersive sound reproduction.​