MartinLogan Passage High-Performance In-Wall Speaker (Single) (Discontinued by Manufacturer) A high-performance and versatile in-wall loudspeaker Equipped with an Advanced Thin Film (ATF) tweeter Frequency response: 4520,000 Hz Equipped with two high-resolution 6.5-inch aluminum cone woofers Paintable endcaps and a variety of cloth grill color options or a paintable grill option