We understand the importance of having audio to enhance a living space, with minimal aesthetic intrusion. The easily installed Vertex Series I speakers utilize the same components throughout the series to ensure a perfect sonic match across the line. Keeping with our philosophy of delivering great sound, Vertex series I speakers will compliment any environment. Slim Profile A slim profile paintable magnetic grill allows for the speaker to virtually disappear in the room VERTEX SERIES IN-CEILING SPEAKERS FEATURES Custom Silk-Dome Tweeter Custom silk dome tweeters have been developed for low mass and smooth, extended high frequency response Custom-designed Woofers with Polypropelyne Cone Polypropylene is employed due to its improved internal damping and smooth high frequency roll-off Intricate Crossover A custom multi-element crossover with audio-grade components is implemented to ensure smooth transition between the drivers Accessory Products Optional square grill adapters are available to cosmetically match square lighting. Optional pre-construction brackets are available to aid in installation or use in ceiling tile applications. Specifications: Speaker type: 2-way, rear side open Tweeter: 3/4-inch soft dome Woofer: 3.8-inch polypropylene cone Crossover frequency: 3,000 Hz Frequency response: 76 to 20,000 Hz Sensitivity: 87 db at 2.83 v/1m Recommended amplifier power: 30 to 100 Watts Nominal/peak power handling: 50/80 Watts Nominal impedance: 6 Ohm Finish: Black baffle/White grille Grille: Metal magnetic / Paintable Accessories included: Cutout template, manual Dimensions (diameter): 4.25 in / 108 mm Cut-out (diameter): 4.00 in / 102 mm Mounting depth: 4.05 in / 103 mm